Hi Debbie D

As you know, I am no expert. But I am so so sorry to hear you are having such a time with your legs.
To me it sounds like a MS exaserbation, and I think perhaps the best thing would be to have your MS flare up looked after ASAP and definitely before surgery.
So my advise would be, try to have a good rest tonight( if possible) Can you take a sleeping pill or something? Do you have muscle relaxant that help?
So first thing tomorrow see your neurologist ast sceduled. Is that your MS neurologist?
So then you can have your MS treatment as needed. When is your surgery sceduled?
All the best. I hope you feel better soon