What do you think is wrong with my knee?

ice and elevate it as much as possible. take ibuprofen to reduce swelling and pain. if the knee continues to be a problem, or gets worse; you need to see an orthopedic surgeon. not the family doc. the surgeon will have the answers. many knee injuries are soft tissue damage. it heals slowly. x rays will not image soft tissue damage. you may need an MRI. this happened to me. the family doc put me on steroids. i was then referred to a surgeon. i was diagnosed with a torn meniscus. an MRI verified that diagnosis. without images and a consult, you are only guessing. knee damage can be progressive if ignored. i did this. i was on crutches for two months. avoid this. see the surgeon.