Sorry to hear you're having problems. I had a tightness with my right that I did not have with my left. I could not bend if I bent my knee. It was like there was a direct connection from my shoulder to my butt and it hurt at my lower glute. Took quite a while before it released at all and still will get sore from certain movements back there.
Just my opinion but because they do so many of these operations it's taken lightly by the health professionals and the patients. The success rate is very high but any surgery where they are replacing parts with man made stuff just ain't natural and shouldn't be taken lightly.