I need to know if i have stomach cramps or heartburn?

Okay, so technically, i prolly don't have heartburn...because that happens near your sternum. This is like, in between the sides of my ribs, below my sternum, and then under both sides of my ribs. It hurts EVERY time after i eat. And at first i was a little curious, thinking it could be my appendix, pancreas, or gallbladder. but my dad said it was in the wrong place. so after i have a tum, its a little better....Im just not sure if this is serious or not, but it's happened for the past 6 days in a row after i ate a meal.