Possible Serious Dance Injury?

My left hip seems to be very hypermobile all of a sudden. It has been this way for a couple years, but now it is taking a toll on my knee and ankle. I keep going to physical therapists and such but all they say is that it's a tight IT Band. I know that's not the only case. When I turn out my leg, my quadricep muscle does not follow my leg to the side, it just stays on top of my leg and then when i go to straighten my leg it clips and pulls my kneecap to the outisde of my leg. I do understand that this is a tight IT band, but i feel like no matter how many times i attempt to do the excersises my physical therapist gave me, it's not helping because there's something wrong with the muscle. I am going to the PT another time this week. Could this possibly be an overstretched hip ligament? or maybe a hip dislocation? it's causing really unequal weight distribution and now all of my joints are feeling the effects, especially my ankles! WHAT DO I DO? IM DESPERATE! Thank you for all your time and concern!