I know how you feel. All my aunts and uncles on my dads side including my dad got Alzheimer's disease. My mom has it now and I had to become her guardian 5 months ago. One of my uncles and my half sister died from early onset Alzheimer's. I just turned 60 and sometimes when I get forgetful it scares the living shit out of me but you just have to go on and enjoy your life. There is nothing you can do about it but take care of yourself and hope it doesn't happen to you. I don't dwell on it personally. It'll just drive you crazy. Not worth it.