Thanks for the clarification Cece and for the good wishes.
The cog fog and fatigue have just slipped back in slowly after the vein started to close. I'm not sure how much of it is because of the physical issues I have, kind of which came first the chicken or the egg. Which issue is the cause of which issue.
For myself, the physical issues (I have foot drop, ataxia, bladder urgency, double vision, jerky eye tracking, altered sensation in fingers, and some other less disabling or distracting symptoms) started to get worse again first and then the fatigue and cog fog were much more pronounced.
I'm getting ready to head to the states for my follow-up and will be gone for a few days. If you want more information just ask and I will try to help. It will take a couple of days for me to respond.
I hope this helps with your decision, I know it's a hard and scary one to make.