It would have been really helpful if you precise the circumstance in which the pain is provoked i.e if it comes when you are at rest or when doing something or if it is permanent irrespective of what you are doing. How long does the pain last? Frequency? What aggravates it?
Pain at the level where you are describing might be due to coronary artery diseases most probably stable angina pectoris
which comes with an effort).
What to do is exercise regularly, lower your cholesterol
in take, get checked up by a doctor for coronary artery diseases and other cardiovascular diseases. Costochondritis
might be another cause of the type of pain you have described and if that is the case, you will require antiinflammatory medications.
It might be necessary to rule out aortic aneurism.
Hope this helps and wish you the best