Ok so im 16 years old male and for 7 or 6 days i have been having problems latley with my memory and really not feeling like myself. I do go to sleep late which is like 12 midnight idk if that is causing the problem or if in stress or depressed. I have been searching online and tryna figure out my problems. But what is really making me scared and worried is that I think i might be developing Alzheimer's or dementia at 16 my grandma's mom had it and then she had got it and died so do any of you guys think I might have people say teenagers don't developed those brain disease in their youth years but what should I belive??