Here comes the stupid comment that somebody has to utter: they usually don't give patients oral meds on the operating table. If it was by IV, it shouldn't have affected your stomach at all.

If they DID give you a lot of ibuprofen to swallow on an empty stomach, it was an incredibly stupid thing for them to have done - especially to a patient with a history of stomach acid problems.

The surgery itself, lying down and being stressed out, could have something to do with it.

You can get pills stuck on the epiglottis. I had this happen once, and it was the worst heartburn I ever had. I had to go to the ER, where they gave me what they called a "G.I. cocktail". One ingredient was lidocaine. My pain was still gone in a couple of hours when the stuff wore off, though.

Talk to your doctor (she says again).