About gall stones

Hi,
I just got my ultrasound done, and the doc said i had absolutely no
stones or inflammation. I asked him why was my gallbladder hurting so
much and he said probably due to acidity etc, and gave me some
antacids and pain killer prescription. I dont intend to take those
medicines.
Is there any other reason my gallbladder hurts so much? Does anyone
have any suggestions?
thanks,
Pindu