I am a male aged 28 and recently visited a doctor 3 weeks ago who did a check up on me and said I may have developed gastritis. He gave me some antibiotics (flagyl) and antacid to take, but during the course of the dose took a whiskey, I am currently experiencing a serious pain in the chest radiating to the back, bloating, belching, and a burning sensation in the throat. What can I do to have it relieved?