Is there anything I can do to recover my past neurological PHENOTYPE, I have a brilliant genotype but my phenotype is crap!

when I was 16 years old I realized my brain was terminally ill while learning basic geography in a history class, I realized that my brain was actually terminally ill and that I was going to die instantaneously. It was horrifying, I remember my friends poking my shoulder asking what was wrong and I knew immediately nothing would ever be the same and there was nothing anybody could do to help me, I began acting crazy I left the class room and hid out in the hallway everybody started asking me what was wrong but there was nothing I could say because nobody would ever believe me.

I went home and tried to force myself to sleep in order to escape from the nightmare of "PHENOTYPE DEATH", but my dreams were just bizarre nightmares about terminal neurodegenerative disease.

I woke up at midnight and started randomly screaming out the window about how aliens with superior technology were going to come down to earth and reveal advanced technology capable of reversing neurodegenerative diseases.

it never happened the aliens never came in order to cure my brain damage, and everyone just abandoned me instantly, and started behaving like I was dead already.