Occasional chest pains (usually after meal) but after farting they're gone. what could possibly cause this so i can avoid it from happening again?

Gas in stomach: Gas in stomach putting pressure on heart. Take some otc gas medication . Also change your diet . Avoid high fiber foods helps. If persists see your doctor.

Gas: Which in turn could be caused by dyspepsia, food allergy/reaction, or, rarely, a more serious cause. Try things such as adding lactase supplements/Beano, enzymes with papaya, Gas-X (although watch out here because too much of this could harm your electrolyte balance). Try eliminating certain foods in your diet to see if your symptoms resolve. Take a walk daily, generally avoid constipation.