Seizure reflection

Sometimes I would have an aura or feeling very strange. It's difficult to think about having a seizure. For me, a seizure is a horrible experience. I do not know my movements. Because, I black out. I have been told that I have tonic-clonic or granmal seizures. After a seizure, I always have a painful and bleeding tongue. Because I bite my tongue. I don't know why. Also, I have a very bad headache