I have read your question,
without any physical examination , I cant conclude anything here ,Since you have given that you did not feel any immediate pain after the fall I dont think they was any fracture
or anyother issue, but it could be a spasm ,or a muscle cramp,X-ray may not be neccessary, Ibuprofen
would have been prescribed for this issue so there is no harm in using it.
I recommend you to give your self some rest.
Even then if you feel the pain , I suggest you to consult a physician .
Wishing you to recover soon,