I'm feeling like a failure.?

Ever since I was little the doctors had diagnosed me with ADD and Dyslexia. To try and help me they put me on Adderal from the ADD and the Dyslexia was never truly cured, I just found ways to work with it. When I was in 8th grade I stopped taking the Adderal and all trough high school make grades were horrible. In the last six months of high school, I decided to go back on the meds and my average GPA went from a 1.7-2.0 to a 3.5-3.7. Now I’m in college and I want to pursue a career in medicine, but every time I take my medication I feel that I am only weakening myself. If someone can get into a good college without medication they don’t need the medicine, but I do. So I’m not really able to deal with it like the person w/out the medication, because they can do it naturally, and I feel like I’m doomed to relying on a pill or being a failure.