Help. Hip joint pain after dancing? Did not fall down.

Many reasons. Trochanteric bursitis, snapping hip, iliacus tendinitis, piriformis syndrome, femoral stress fracture, osteoarthritis.Those some of the causes for hip pain in a dancer. Pleas check it out.Thank you.
May not be joint. Pain around the hip may be the hip joint but there are other structures around the hip including bursas or tendons. The pain you are having i suspect is related to bursitis. There are a variety of bursas around the hip and the most prominent is the greater trochanter. Trochanteric bursitis characteristically has pain on the outside of pelvis when touched. I suspect you injured this.