Pelvic tilt inner butt pain?

Not sure if this is related to the surgery or not, but i thought maybe someone here might know what im going through. I had a microdisectomy 10 weeks ago aswell. I first noticed this pain 2 weeks ago when i finally started PT.

I often get a sharp pain in the center of my inner glutes, slightly lower than the tailbone. I am able to replicate it consistently when laying on my side and stick my butt out by tilting my hips. Its not an exaggerated movement either, and my back stays flat. Its very painful, 5-7 on the pain scale. I dont get it when i sit. It doesnt shoot or travel, it stays isolated to my inner butt for less than a second. It also doesnt burn or cause numbess, so i dont think its nerve related but im just guessing. Im waiting for a response from my surgeon right now, but it inhibits my ability to do PT exercises.

Anyone have ideas on what it could be? Thank you!