Do these symptoms sound like gastritis?

Firstly, I’ve been to a DR and he says Gastritis but I’m not sure.
I have cramping really bad after food, and even after water. My upper abdomen is really sore, but when the Dr poked and prodded me it didn’t hurt so bad. I just feel like I’m cramping all the time and I’m in so much pain.
I’m worried I’m bleeding that I have an ulcer or something, yet he said that if he felt my stomach and I had an ulcer it would be unbearable. He also said he can feel my heart beating in my abdomen but I’m petite so apparently that’s normal. I suffer from IBS but could this be IBS related, I’m in so much pain after drinking or eating, not sure if I should admit myself or not. I am cramping like I have my period. It’s awful. Any help? I’m not asking for a diagnosis, but maybe someone whose had this and can tell me what to do?