Your symptoms are suggestive of gastritis, but the initial travelling chest pain from chest to the arm has to be evaluated. I would advise you to visit a ER so that the cause of the chest pain can be ruled out by ECG, Trop I, etc. so that the underlying cause can be found and treated accordingly. Chest pain should be looked into seriously. For your gastric discomfort you'll require an antacid and the following steps may help: - Don't skip meals, you may not feel like eating but in such conditions you should have the reduced amount in frequent intervals(i.e. 3 square meals broken down to 5 or 6 as you can tolerate) and slowly increase as you get better. - Reduce/ Avoid spicy,fried, fatty, junk and oily food - Avoid/ Limit drinking coffee, tea and carbonated drinks to once a day - Exercise regularly (30-45 mins of cardio exercises regularly) - Increase daily intake of water to 3 liters - Avoid/Stop smoking and drinking if you have the habit - Reduce stress through methods such as yoga/meditation/tai-chi. - Avoid painkillers as it will increase your gastric problems at this moment. If the problem persists or worsens visit the ER at the earliest