Hello, thanks for posting.
Your symptoms show irritated colon
which justifies all your complaints. This condition consists of abdominal swelling as a result of the indigestion
. Abdominal swelling causes back pain
and rapid heart rate
and all of these cause an emotional discomfort. You need a reduction or better said elimination of: coffee, milk, carbohydrates, fizzy drinks and spicy food. Anyway I recommend to consult your gastroenterologist, who is going to find a solution to your problems by examining and recommending. Keep safe!