/sci/ - Science & Math

I'm a little worried about my past drug use and how it's affecting my ability to perform complex cognitive tasks. I was a coke head, drinker, and pothead for a couple years and I just recently stopped. Now I'm going back to university to get a math degree. I used to be really smart, and took advanced math and science classes in HS, but I'm concerned I've sucked any talent I might have had out of brain through my drug use. Anyone here have any recovery stories about using drugs and later going on to become successful at science/math.