I'm painful every time after eat. 3-years post surgery. Is it ulcer or leak? Should I go emergency room?

I feel huge pain every time when I eat even very little food. Pain decrease gradually after each meal. Is it a serious leak or just ulcer? I poop normal, no blood or black stool. If I wait for doctor appointment it will be 1 month wait. But I'm in lots pain now after each meal, unless I stop eating, and only consume liquid. Should I go to emergency room? Thanks