Hi, Im Suffering From Gastritis, Burning Funny Discomfort Pain In

Hi, Im suffering from gastritis, burning funny discomfort pain in the stomach towards the upper left abdominal and making me feel weak, and I always thought its heart attach related conditions. short of breathing or heavy breathing especially after a meal and that breathing condition is also experience when sleeping on my left side of the body. I stop taking alcohol and food that aggregate gastritis two months ago. Blood was drawn from me and a h Polari bacteria showed positive. Dr prescribe some two types of antibiotics and ulcer gastric tablets. I have finished my medication course for a month now and still going through the same problem. Pls help and not sure anymore if it is really gastritis or something else.