sounds like you got some kinda dependancy gonig on.
I spoke to a heroine addict one time years ago. He was into herroine his buddy coke. I said why not some pills or booze or osmething why does it have to be coke and heroine for you guys. They replied thats there poison of choice. For years I figured thats how it goes each gets hooked on there poison of choice. Which i guess holds true to some degree. But i've met others whom it didnt really matter they'd turn any substance into a problem and are best off not messing with any of it.
Gotta be careful. I hope you can get this sorted out.