Health issue? Please help

So for the past week my upper abdomen hurts so bad after I eat. (Idk if this is related or not but bare with me). I ate at noon today and then around 3pm I was sitting down scrolling through fb and got extremely dizzy, I felt like I was going to faint and was super nauseous, I almost puked a couple times but nothing came out, just me dry heaving. I decided to lay down and felt exhausted as soon as I laid down but am too scared to fall asleep. It’s now been 3 hrs and I’m still dizzy and nauseous. Anyone know what this could be???? (Also not pregnant, if that helps narrow it down)