Are you very preoccupied lately? Have you been sleeping poorly (another menopause symptom)?

I find that for most people, keeping track of ordinary things becomes difficult when preoccupied or under a lot of stress. (Lack of sleep is also a type of stress.) It's like their brains can't handle the ordinary because it's dealing with the complex! Perfectly ordinary!

Writing notes to one's self is the only answer. You can write them on the back of your hand with a magic marker. Assuming of course, you remember where you put it.