@wbb098 muscle pains can resolve themselves even disc injury can sometimes resolve itself. It's the possibility of fracture that is concerning. If you had a hairline fracture, say, in your hip, it could become a displaced fracture with continued normal use. It could be significant to know sooner than later.
It sounds like muscle involving your pelvic floor muscles, but could be dislocation or other damage to the sacrum or pelvic arch.
Most hip fractures occur from a fall to the side.
It is possible to have fractured a vertebra in this type of fall.
I know how you feel. I'm exactly the same. I fell off a 3 foot garbage can backward and skipped imaging. But that thinking is foolish, especially with continuing or new onset pain. I don't think an xray is sufficient. It really is best to have an MRI and pray to find out that you didn't need it after all.