Inn to burp vomit? or to have chest pain after you eat?

Sometimes when I eat food, take a pill, etc it goes down slowly in my throat (even with water). Then I'll hiccup with chest pain (like really strong hiccups) and sometimes I'll burp vomit. My breastbone hurts, like right under my center ribcage. And it'll feel like my chest is burning !!!! Especially when I lay down, or eat at night, or even a large meal. I cant eat hamburgers, pizza, hotdogs, fried foods, spicy meals like taco bell :( Without reacting badly. I don't have IBS but it's weird...and sometimes I'll have a sour taste in my mouth for a whole week and it's awful...I don't know if I ate poison or something....