I can relate to your situation. My husband was diagnosed via brain scan with MCI three years ago. It showed a mild stroke but the time of when this happened is unknown. He has limited driving privileges to known places. I have noted him mixing up events, when things happened, etc. The progression of his disease has been gradual (he has been taking Donepizel (Aricept) for several years which can slow the diasease progression in some patients. I am finally accepting where we are (it took a long time) and accepting of our situation, as has my husband who has now accepted that he has memory issues… never calls it Alzheimer’s. I too track him so that I can bring him home if he gets lost… that feeling of independence is so important for them to have as long as possible. I am thankful for each day. May God be with you on your journey!