Symptoms of hip dislocation include:
Severe pain in the hip, especially when attempting to move the leg
Leg on the affected side appears shorter than the other leg
Hip joint appears deformed
Pain or numbness along the sciatic nerve area (back of thighs) if injury presses on this nerve
I hope it's not a dislocated hip, but the level of pain sure signals something is wrong. If the pain persists, forget waiting and go to the ER.