Your pain is related to the gastritis
that is increased after eating. There is nothing to worry about you should antacids like esomeprazole
for a period of 1 week to reduce gastric acid
secretion that will settle your pain. Vommiting is due to increased acidity that hurts your stomach walls and reflux of gastric contents from the lower esophageal sphincter.
make a habbit of drinking milk regularly that will provide relief along with antacids.
I hope I am sucessful in solving your query If u have further you can ask me
Get well soon
Dr. Azhar Sattar