Welcome makemebetter -
The support here really helped me get through those first days of not drinking. I don't think I could have done it without a continual means of support.
I don't have any experience with heroin, but others here have been where you're at. You might want to check out the substance abuse board:
Substance Abuse - SoberRecovery : Alcoholism Drug Addiction Help and Information
Have you thought about talking to a doctor (there are some that even specialize in addiction). Glad you're here..... you're not alone and you can recover!