Willisium,
Here is some advice from someone that actually went through this. I have ADHD. No, it is not just a medium, yes it can be mis-diagnosed. Ask my wife, I will be in the middle of a sentence and completely change the subject lol. I was diagnosed in second grade and had taken medicine for it until freshman year. I started feeling a little better then because of some "growing up" things. But alas, it was not gone, just not as bad. I went to the doc the end of my senior year because I was having problems with it all and took a sample for 2 days. I tried to get my medical and was completely honest with the AME (kinda a mistake). I was denied and after about a year of corresponence with the FAA, AOPA, and my psyciatrist. The FAA requires you to be off of the medication for 24 months. The point of the time is to prove that you can function as a norman human being without the drugs. Your good grades should be more than enough, seeing as I could barely hold a C average without the meds and I was approved. Exactly 2 years after the denial I went to an AME, told him I was previously denied and told him what they told me, and walked out with a class 2. Get the notes by your doctor, and a note from him saying that you can be a normal human being without the meds, and hand deliver it to your local FAA regional office if possible. They put all my information before a board and they made the ruling. I hope all works out well for you. I am confident that you will get your medical.
Good Luck.....
AEFO