Dull tightness in left chest. Pain.

I would advise you to visit the ER and get evaluated in person. It is likely that you're having a muscle spasm. You may require a smooth muscle relaxant and antacids. These following lifestyle changes may help in your situation: - 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 - Increase daily intake of water to 3liters - Avoid/Stop smoking and drinking - Reduce stress through methods such as yoga/meditation. - Avoid painkillers as it will increase your gastric problems at this moment. If the condition is persistent or worsens visit the ER at the earliest.