Trust me there is help out there. You just have to find it.
I was am IV heroin user, untill one day I did 12 grams in 3 days and realised I have a problem. Your will has to be stronger than your addiction. Worest part is the first 5 days. If you can survive that you can go all the way.
I've known quiet a few people who put themself in Thier local MHU as involtary for 5-10 days so they can't use and if your depressed you could benefit from being in Thier. If you lack insurance(((assuming your in the US)) they can't refuse.you.