I've been diagnosed with it since I was about thirteen, ended up in GOSH for two weeks for intensive physio (and probably also EDS, but that's another thing entirely). My hip still sometimes comes out and it's a great way to introduce it to people. Your best chance is probably with physio tbh. Your one seems ~inexperienced~ or whatever, but if you're pretty high on the Beighton Scale then it's physiotherapy you'll need.