Hi there AnonymousMe,
I too was diagnosed with epilepsy around the same age as you are now. I can completely relate to feelings of depression and anger that you talk about. I found it very difficult to come to terms with my epilepsy to start with. But I can assure you that it does get better. Epilepsy is not always for life. As im sure most people in this forum would agree, epilepsy can go into remission and never come back. Sometimes it can go into remission for 20 years and then come back out of the blue.
Perhaps you should talk to a neurologist regarding the effects of the drugs as I am no expert and I wouldnt want to give out false advice.
You really should try not to let your epilepsy interfere with your school work. The best thing to do now, it to knuckle down and et your grades back up. Your doctor will be able to advise you regarding your meds, perhaps keppra isnt right for you and you need to change to another one.
Keep your chin up and remember we are all here for each other here. If you wish to email me privately, then feel free... there is a link below my screen-name