Thanks for your question.
From the symptoms you are having it seems to be serious and definitely a matter of concern.
I want you to answer few questions before coming to a diagnosis.
What is your age?
Did you loose consciousness after falling?
Was it associated with weakness or numbness
I will advice you to have a X-ray of lumbar spine
ap and lateral view.
For a relieve of your symptoms you may take analgesics with proton pump
Avoid heavy works.
Hope to see you soon in your best health.