What Causes Left-sided Chest Pain And Vomiting After Eating?

I have a bit of an odd question. Lately, there are times after eating fast food where I ll start having a pain on the left side of my chest and taking deep breaths can make the pain trigger or it will be hard to take a deep breath. I usually think it s just gas buildup in my lungs as I feel the constant need to burp, but sometimes those burps make me want to vomit. Usually after vomiting, I feel a bit better but this time after vomiting, I think I may have scratched my throat. The next day I had a sore throat most of the day but was able to eat my food just fine. Today I ordered some food from Dominos and was doing fine until I started finishing off the sandwich. Then the constant need to burp and throw up came back. I went ahead and vomited but my throat has a sharp scratchy pain in the back. Should I be worried or is this something that just a little rest can help?