First let me say, I am sorry, that you are in pain.
Even though I have never actually dislocated my hip, it feels like it is wanting to, all the time I make a " wrong" move. It feels like it is slightly out of alignment, but jumps right back into place. It hurts really bad.
I have no advice, but mayby you should try the ER.
Good luck, I hope you can do your shoot.