new to this need advice

Hello to all out there! I have read many of these posts and I decided to take the plunge and ask for help.
I have been riding this opiate train for almost a year now and I need to get off. The best results I have had seem to be just jumping off CT but even that has yet to work. I do believe that most of this will be rambling just to get some stuff off my chest but I do need some answers as well.
First off let me start with my history. I am a twenty five year old male with two beautiful daughters (two and three months) and I have a loving and supporting fiance. I have come to realize that I am an addict. I have had some severe problems with cocaine in the past (partying too much leading to being broke and falling behind on bills). I have had problems with booze mostly attributed to partying/binge drinking. I have never been an every day drinker but the coke had become a five day a week deal. It had taken four years to get to that granted but it was still a problem. It had become a major point of contention (sp?) with my ex. I had times of sobriety with cocaine that were great.
I went away for a summer to work as a fishing guide and had no acess to the drug but as soon as I got back to town I was right back in it. After my ex and i broke up I quit because I didnt want her to spring it on me in a court battle and loose my daughter. Luckily she was not that vindictive. I continued to stay clean (except for the booze) and things were great. Work went well and I met my new fiance.
That lasted about six months then I asked my new lady if she woul like to try it. We experimented a bit that summer some coke some shrooms and some e. It didn't get out of control.
I have had pain killers in the past due to an auto accident and built a steady tolerance. I started snorting them and drinking with them to help them be more effective but once my pain was gone I had no trouble getting rid of them. I have messed around with them a couple times after that and it was just fun.
Then Thanksgiving of 08 rolled around. My dad gave me three 10mg norcos and a beer. He offered some to the fiance but we had just found out she was pregnant and she declined. I think this was the turning pt for me because on the way home i remember saying you shold have grabbed them anyways and given them to me. I had the craving for more for the first time.
I should know better than to mess with these things as my father (who has had battles with cocaine and booze too) has been addicted to these going on fifteen years. I had also watched his wife battle a severe addiction and an overdose just prior to thier divorce. Of course my thoughts were that this couldnt happen to me.
My fiance had a friend of her family who had cancer and needed to sell some of his pills to finance the fact that he wasnt working. SWIM going to help him out. Slowly over the next three months SWIM was ng way into the supply for a debt of $500 every two weeks and was doing over 3/4s of the 30 mg oxys that was supposed to be getting rid of.
I was getting into the 80 mg per day range but it would be a binge type deal. 4-5 days in a row then a week break. before long I was purchasing more or making up lies to my dad as to why I needed them. i became an every 3 days then every two then by mid may it had become an every day 50 or more mgs a day just to get well.
I tried to quit once and had five days. I almost had her licked but I fell back.
THen the baby came early and there were complications. So i had excuses. Mom had to have a csection and i had acess to more pills. Then my fiance had to have gall bladder surgery more acess and more excuses (stress). My fiance was on the pills herself for almost two months straight and she had to to detox. That was my last excuse. I had to be supportive of her.
It was time for me to come clean. I tried and failed for the second time around mid july. and tried again. I asked my father for help. He got some methadone for me and I made it five days feeling great (only 10mgs per day) but then I fell again. I tried the methadone route again a couple weeks later and only made it four days. i failed again. In between all of this on/off I tried smoking heroin and I have done that eight or ten times when I cant find oc's.
Now here I am. Im 5000 in debt to my landlord and hes five days away from kicking me out if i cant come up with this months rent. My fiance doesnt know this and im afraid to tell her shes been real supportive but she only thinks that we're behind this month and thats why hes gonna kick us out. I have blown another five grand in savings and have no money to my name even though I have a 65000 a year job.
I didnt have a script so this has been mighty spendy.
Sorry for the rambling (if you're still even reading) but it feels good to get this off my chest and i understand now why people do this. Here are my biggest questions.
Last week I started another methadone treatment (on my own) and did three days of ten mgs> then I had an oc binge for two days and did three and a half 40s on tues then one and a half wed. I was good for two days and was pretty miserable so friday night I bought a tenth of a gram of tar and smoked that. I was good for two more days and tonight i bought a quarter of a gram and smoked that. My questions are how long do you think my withdrawal will last now? I have given my duration history and dosage history and my last two weeks of use so if anyone has some educated gueses I would really appreciat that.
I am in sales and if I'm real sick i don't make any money.
That being said would anyone here reccomend taking the methadone route for a week and a half then trying to quit on a five day weekend I have scheduled? or should I just tough it out now?
Also any tips on getting through this. I have tried all the usual tips working out and hot showers have been my favorite but i also have a limited supply to benzos and those seem to help. My biggest hurdle is the sleep thin I cant stand the RLS and the insomnia and I sell mattresses so I can't be tired all of the time. LOL
Any help/ advice would be great to get me through the WD. I also know that I need to get a recovery plan together and I plan on going to meetings with a buddy who has been clean from coke four months now and picking up a real experienced sponsor. Im not religious but I do read a lot so any reading material suggested would be great.
Please if anyone has been here and thinks they may know how long this will last for my situation I would be eternally gratefull. I will say it has been very encouraging to see there are people here who have 10+ years of use and have done it. My fiance is very supportive too so I am thankfull for that.
Again sorry for the rambling on but I do feel better. Thank you all in advance.