Metal surtures after Gallbladder removal w/ MRI

I had laparoscopic gallbladder surgery about 20 years ago.  I'm assuming they used metal surtures/staples during removal.  Two years ago, I had a MRI scan for pain in my knees.  Since then I had pain in my right side just below my rib cage. It was an acute pain immediately after the MRI scan.  There is still residual pain to this day.  Is it possible that something tore open?  If so, can this be the cause of sharp pains in my mid back that the doctors have not been able to pinpoint after X-rays?  So far, they've tried anti-inflamatory medicine, strong antacid medicine and pain killers but still no final diagnosis.  Can stomach acid leak into my abdominal area and cause such pain?  They now want to do another MRI scan to check out my back more and I am scared to death.  Any ideas would be greatly appreciated!!!