I was dancing as usual and when i went to stretch, my hip popped out and back in. it made a huge sound. hurt a little. should i be concerned?

Sprain: An acute sprain of the hip joint was likely. Cold applications for forty eight hours followed by heat applications,rest,and if you can take them,NSAIDS like ibuprofen help control inflammation that accompanies such injuries. Allow 7-10 days for significant joint injuries to heal.

Yes: You may have increased limberness. This in called hypermobility also known as Ehlers Danlos type III. This can run in your famiiy since it is genetic. It is called benign hypermobility. The risk of shoulder dislocation is that lateral in life you can get osteoarthritis. The recurrent dislocation is serious and you need to discuss with your physician about seeing orthopedics

Hip popping: If you are walking, running normally without pain( and that means no pain at all) ,and no change in the alignment of the leg I would not be too concerned. if there is pain on motion or on repetitive motion or over a few days or weeks pain develops have it checked out consider, tenodnitis, tendon sprain, avulsion or even labral tear F/U wiht doctor /urgent care /orthopedist