It's a natural response to feel leerie of new things,especially meds,but do not let reading and hearing about the possible negative side effects sway you away,without giving something a try,but also stress to your doc,that you are concerned about your GPA,it would be a good idea. When I first was DXed,I too, was concerned with the same or similar thing,talked it over with my pdoc,so her and I kept a close line of communication.
I made honors,2 semesters in a row before I graduated,who knows,looking on a positive end,the meds may have helped me not fall back.
I understand your cautious feeling,but do not self-defeat possibilities,there are also postive side effects to meds too.
I'm sending you many warm wishes for good luck and healing.
Take care now,
DE