Dealing with Health Issues in my Leg

Hello, I’m a teenager and I’ve been dealing with some health issues with my right leg for about three years now. I had flat foot reconstructive surgery over the summer. While it fixed the arch of my foot it didn’t fix the pain. After months of recovering from the surgery I started to develop a collapsing of the knee and the hip being internally rotated every time I take a step. All of my tests are coming back fine so none of my doctors have been able to diagnose me. They currently have me walking with a straight leg around the house and when I leave the house I am on my crutches. I haven’t been able to find anyone similar to my symptoms so I was hoping I could on this app. It’s hard to talk to my friends and family about this because they don’t understand. I’m just hoping to talk to someone who understands what it’s like. Sorry for the long post :)