Bless your heart Payne -- I know exactly what you're talking about. It's miserable. I'm so sorry for your loss.
While I didn't achieve all that you did, I too mourn the loss of my "career." I was an Optician for many years, and I really enjoyed working with the patients, and with the doctor. I enjoyed watching people regaining their good vision, or seeing a little boy getting his first pair of glasses and not knowing that the green on trees was actually individual leaves!!!
Like you, I've lost my ability to carry on a reasonable conversation without stopping for minutes at a time because I either lost my train of thought or because I can't think of a word I need.

Until I found out what it was, I feared Alzheimers!
Plus the depression due to my physical disability doesn't help. I'm not sure what's worse -- the disability or the medication. LOL
So I totally understand, Payne. And my thoughts and prayers are with you. Just know that you're not alone in this. And if you ever want to talk, feel free to message me. God bless and please take care. Hugs, Lee