Been there myself. Obviousely, I don't know what your problem was, but mine was an a typical spike similar to an epeleptic. i was told that it may change as the brain matured (I was 17) After several years of retrying, nothing changed so I gave up. Recently, I tried again and all is well.
I hope that this proves to be the case with you or maybe even sooner.
I am told that it is not uncommon, so good luck.