I started with my husband's primary care doctor who gave him a basic question and answer memory test. From the results, she suggested he see a neurologist. Once in with the neurologist, he gave him a series of questions, and "do a certain set of things" test, which resulted in an MRI and Pet Scan. Then the diagnosis of MCI. From that point, because my husband was in the mild stages, and could still do things on his own on home - although he was forgetful, had sequencing issues, and couldn't remember things, and/or would lose, things - the neurologist put him on lequembe infusions to slow the Amyloid plaque growth down. He's on his 17th infusion this coming Monday, with one more to go before he goes on Maintenance. I would suggest you see a neurologist in the Phoenix area, and/or see if you can get into Mayo Clinic, with your primary care's referral. As for her getting combative, that's the disease. It's not worth fighting over. Keep the peace, take her to Mayo Clinic or some specialized medical care for "memory loss" where they can help diagnosis what she has, and more importantly. if in the early stages, what you can do. Best, Karla