Are drugs cause of my anxiety?

Lately ive been feeling the whole derealization thing and havent been able to figure out why besides blaming anxiety...I have many other symptoms as well for ex:paresthesias, chest tightness, shallow breathing, heart palpitations, constant worry etc...Is it possible that marijuana and oxycontin abuse could have caused this?  I havent touched oxycontin in over six months, four months before I had my first anxiety attack...I stopped smoking marijuana two months ago and after all the ER visits and everything checking out fine(heart and lungs), I still have episodes of panic but now Ive been feeling like im in a dream...I cant stop thinking about what could have caused this mess...  Im going to a physciatrist which really hasn't been helping I cant seem to get that one question out of my head.

Any feedback would be appreciated

[newportttttttt]

wait... never mind no comments thats a shame

[ILADVOCATE]

Yes use of drugs like that can contribue to anxiety disorder and make it worse. They can also have long term side effects of their own even when discontinued. If you are concerned you might want to see a neurologist for a further evaluation.