U could be eating to much or could have something wrong with ur intestines or ur stomach I'd try eat a little less if that does not help go see ur doctor to make sure it's not something more serious
How come every time I eat I feel like throwing up and I have gas?
You could be constipated (which can cause gas and this feeling like your food is like sitting at the top of your throat even though you may have hardly eaten). I say that if you are worried about it them go see your doctor.
You might have a condition known as IBS where eating even the smallest amount of food can cause wind and make you feel like vomiting.Intolerance to certain foods usually start off this problem.