Sounds similar to my experience. I have been to 9 doctors most of whom hem and haw and give me some kind of explanation, none of which have been correct. My physical therapist told me I have gluteal tendinopathy. When I researched that, it's spot on. It seems no doctor in this area treats it except for recommending physical therapy which I have had several times with no lasting benefit. I don't know what kind of specialist to see. My pain doctor referred me to a neurosurgeon for back surgery but he wouldn't see me until I had PT for my back instead of my hip. I don't want back surgery anyway. It takes forever to get an appointment anywhere.