I empathize with your situation. My mother was diagnosed with dementia but it came on fairly quickly. She is 81. My brother lives with her and does what he can for sure. I would suggest asking if you can take her to an appointment. Are you able to contact her doctor and express concern? I know that due to HIPAA, they will more than likely not tell you any information, but you can ask to speak to a nurse and let them know you understand that they can not give you information, but you wanted, as her child, to let them know some symptoms. I had to do that with my mother and my brother took her to the doctor and they scheduled an appointment with a psychiatrist to test her due to her depression and memory problems. Just a thought. Hang in there.