first all of,congrats on getting your life back on track.i quit smoking a month ago so i know how you must feel.maybe its due to the heroin leaving your body .maybe the sulfur in your diet has something to do with this.
worth keeping tract your dairy intake and meats.
I am also a recovering heroin addict. I have been using suboxone instead of methadone though and have been clean for 4 years. I have had chronic constipation since the age of 8 but I do know that methadone and suboxone cause constipation. However, I have recently been having horrible swelling of the stomach and discomfort accompanied by rotten egg smelling burps and gas. It's possible that drugs have ruined my body, but this is something that is quite recent...does anyone or have you had this issue?