Massage gun issues

I’m in physical therapy for back and left hip pain. I’ve got fibromyalgia & scoliosis in addition to EDS, and I have had two surgeries on that hip.

On Friday, the LPTA used a massage gun. When she used it, it felt awesome. There wasn’t any pain for the first time in years.

By Saturday, my pain was worse than it usually is. It’s stiff, and the pain is almost constant and very intense.

Has anyone else gone through this kind of pain after using a massage gun?