I was wondering if you are able to use one of those (whatever you call them) wheeled carts that you can push in front of you, but they have a seat where you can sit down if you get tired, or if your feet and legs need a rest. I don't know if this is appropriate for your situation or not, but I have one that is really nice, though just about shot.

The handles are height adjustable and there is a nice seat to sit on, which has a storage area beneath it for shopping. I got mine from someone whose mom didn't need it any more, and it is a little heavier than the ones I have seen at Sam's in the pharmacy for around $100 or so. You may have seen them; they are different colors.

Don't let what you think your doctor will feel get in your way of thinking what is best for you. You sure don't want to get out somewhere, or even at home, and fall and break something...

Hope you are OK.
Cathie