Hello Doctor. I Have A Noise In Stomach And What

Hello Doctor. I have a noise in Stomach and what ever the foods I had within 20 min I feel bloated and cramps inside intestines. sometimes I get a gas troubles and I may fart for a second or I will throw up in wash room. I used to work out everyday and I eat healthy foods, at least I eat 6 meals a day contains 3000 calories diet.as soon as I left taking supplements.my metabolism goes down..after I week the stomach problem has been started.
I would like to know the region why it is happening?