MaryAnn, first and foremost, HUGS!

I am sorry you are feeling so poorly.
Walgreens.com has a portable scooter very reasonably priced, and its light weight and easy to travel with. Pops apart and pops right into your trunk. Easy to care for, and half the price of most others.
I agree with the others that the JC virus scares me, and I would want to be tested if I was on TY and doing poorly. I hope you at least have that talk with your MD. Congrats on doing a full year btw!
Please know we are here, even if just to hug you or listen.