I currently have a pain which I think is PS, however neither of the two physios I've seen have agreed.
Can you describe your symptoms? I'd be interested to know if I have a similar condition.
I have a pain deep in my right glut, which I don't feel when laying down or standing up. The most painful movement is bending forward, especially if my legs are kept straight(ish). The first five/ten minutes of running it hurts but after that the pain subsides and is not noticeable. I sometimes get a sharp pain down the side of the leg, but this is only for a very short time. Bizarrely, sneezing is also painful!
Would be interested to hear your symptoms and thoughts, and hope you recover speedily!