Have you had any strokes? Get MRI's of all the blood vessels from heart into brain. I had many done! I had many before they found out I have small blood vessel disease and I have Connective Tissue Disease that is the cause. Not curable and nothing to stop it .. we all have stuff to deal with, but you have to get all test to hopefully get the help for what is the problem. I have those same plus many more symptoms and now I know I just have to sit and hope it goes away.