Hi feelstuck,
Not sure if your main struggle is physical withdraw or mental obsession. My DOC was cocaine, so I know the physical is different for those drugs. But if you're talking about the obsession....
I thought about how I could get away to score again every minute I was awake for 2-3 years. I don't think about that ANYMORE. Things can change for you if you really want to be clean and follow some suggestions from people at meetings. It worked for me.