Pain In Lateral Right Quad

I woke up one morning with searing, cramping pain in the upper outside of my right thigh as soon as I stood up.

Ended up in the Urgent Care and left with crutches and a 5-day Rx for Methyl Prednisolone.

That helped a lot, but as soon as the course ended the pain came roaring back.

Back to the Doctors and left with a 10-day Rx for Prednisone - again that worked, but after the course, back came the pain.

X-rays and MRI showed nothing significant - if anything there is a slight narrowing in my L4/L5 left foramen. So there should be pain on my left, not right side.

I'm now on Celebrex/Gabapentin/Baclofen that sort of keeps it under control waiting for an EMG test and ultrasound exam. There are good days and bad days.

Running is out of the question, but I try to keep active on rowing machine, recumbent cycle and isometrics - when pain is moderate, I walk on the treadmill

There is zero back pain, just the spasms in my right thigh when I walk or dance. There was some suspicion that my LFCN might be impinged, but that should lead to superficial tingling, numbness, not the deep, searing spasms I've been feeling.

Sitting, lying removes the pain, but once I stand and walk a few paces...

Any thoughts, suggestions?