What is your age?Are you diabetic or have high blood pressure?Do you have any swelling in the left lower margin of your chests? Do you have tenderness when you press on to your chest?Is it more with breathing?Is it a burning pain or a dull aching pain?One of the most important cause of chest pain
is the musculoskeletal pain
.Anyway you need get an Xray chest and EKG/ECG done to rule out the cardiac causes of pain.Acid reflux
disease can also cause chest pain.So you may get an physical examination done at the earliest..