I'm (21, male) struggling to get through University with decent grades. I work incredibly hard and have just started CBT (therapy) for generalized anxiety and OCD.

I have become aware of the fact that my anxiety affects both my processing speed and short-term memory. I know that my cognitive capacity could be greater than what it currently is. 

Being 21, and still doing 1st year courses, Is it finally time to admit that I cannot become efficient without medication? How do I know if I can overcome this with will power and therapy alone?

Would appreciate some success stories and general feedback.