Hi Angie,
Did you hurt your back?
Do you have any nausea or other stomach symptoms?
There could be alot of reasons for your pain and we would need more details to help you out. It could be muscle strain, compression of nerve, gallbladder, muscle spasms, etc. If you are in alot of pain, I would make an appt and have your doctor evaluate you and decide what testing if any you need.
Good luck and please keep us posted.