Is it normal i might be brain damaged

As a kid I fainted in school twice and neither time I got taken to a hospital. The first time I fell backwards on my chair onto the floor and the second time I passed out in a flight of stairs. I dont know if I fell in the stairs I just remember walking up while my eyesight got blurrier and blurrier and I lost more and more power then I dont remember anything until I opened my eyes with my whole class surronding me and I was sitting down on one of the steps at the top of the stairs so its possible I sat down and then passed out. Maybe I hit my head those times and now im brain damaged.