I'm glad that you are experiencing some improvement Lynn.
Those types of heating pads are excellent .

The PT should help to bring things around; and it does sound like your PT is on top of it. Her detecting the twist in the pelvis is an indication of that.
When there is a problem with the lower back/pelvis, be it pain, inflammation, joint degeneration, spasm or a combination of those, the compensations that occur in the mechanics can perpetuate more problems.

It is odd that your neuro didn't mention or pick up on the scan findings, so it is definitely worth bringing up. Sometimes new symptoms are simply considered to be a progression of an existing condition like MS, when in fact the new symptoms are caused by something else entirely and would benefit from specifically directed treatment of that cause.

Wishing you well and speedy relief from this .

With love, Erika