Hey, I made the diagnosis from thousands of miles away!
This has NOTHING to do with alcohol or gallstones in your case. It's from your pancreas being bruised/irritated in some way during your surgery. In the USA, pancreatitis is almost always from gallstones or alcohol, so docs forget that there are actually lots of other things that can cause it but are just much less common. Surgery, drug reactions... sometimes no reason is ever found.
Low fat is not the answer at this early stage. The answer is bowel rest, meaning either nothing by mouth or just clear fluids depending on how sick you are, an IV if you can't stay hydrated (which or course means being admitted) and sometimes antibiotics. The pain, as you know, is a sign if illness, so if it persists that means you need to be in the hospital, like it or not, NOT just to feel better with pain meds but because you are sick and that's where you need to be. So, if you are not feeling better, bite the bullet and stay in the hospital. Pancreatitis is a serious disease with a 10% mortality rate.
