I use an alarm and an app called ‘wunderlist’. I also spend most of my day doing jigsaws, find a words etc. - a neuropsychologist told me ‘use it or lose it’.
I’ve found that being in a mixed mood has not impacted my memory however if my brain is racing I struggle with encoding. My doctor said even healthy people who are multitasking struggle with encoding and their memory. It’s why down here it’s illegal to go anywhere near your phone while driving.
I don’t know how old you are but any healthy woman as she approaches 40yr struggles with memory. Hormone levels may be worth checking.