Sickness during & after eating?!

Every time i eat i feel sick at the top of my stomach only the top where the stomach connects and i have puked from it i have learn to hold it down. Even drink does it and now sometimes i get this heat burning all over my abdomen then i get sick but sometimes it's before i get sick. Can someone help me? Thank you. Also its when I'm in the middle of eating sometimes sooner then that! It's been going on a few months now maybe longer i always ignored it but now it's gotten 10x worse.