My dad had alzheimer's (and Parkinson's) and for the last 5 years of his life he was about 2 years old. I also held a great deal of anger at him prior to the disease and realized that the person he ended up being was not him - I could not be angry at him for his past behavior with me. My brother held on to his anger longer than I did but finally, just the night before he died, told him he loved him. It is a terrible disease and yes, I worry about getting one or both of the diseases. I have considered going to amemory clinic for testing but I need a referral from my primary care (HMO doctor) and our university that had the clinic recently closed it so that option is no longer open to me.