I don't have answers for you except to suggest you bring it up with your primary care provider. There are lots of physiologic issues that can impact cognition. Have you had a full work up/physical lately where this was addressed?
I struggle with memory issues too. I do believe it is trauma related for me. T told me he knows he's with a traumatized client when they have terrible memory issues, particularly for their younger years. For me, my memory sucks in every way though, it's embarrassing.