Help please. what caused me to feel bad in my stomach 2 hours after eating breakfast? it was a bad feeling that came over me. my chest felt funny. my body began to feel jittery. once i ate, the feeling went away gradually. but i still felt a bit bad?

Several causes : Those symptoms could be caused by a drop in blood sugar following a high level after a meal (especially a high carb meal like pancakes or waffles with syrup/sugar; less likely with protein meal), but could also be due to a stomach issue like gastritis, reflux, or even an ulcer. At your young age a heart issue would be unlikely. If this is a recurring problem you need to see a Dr & have lab work