Random Chest pain n difficulty breathing

I always have a distinct feeling in my chest slightly to the left from the middle. The feeling is there even at rest n it is always at the same area n I've started noticing this fr almost a year now. Sometimes I get chest pains in that exact area, sometimes accompanied with a dull,achy back pain (near the left shoulder blade) exactly behind that area of the chest. The chest pains r most dull or stingy or achy n almost always accompanied with needing to take hard deep breaths through mouth to breathe enough air (which happens very often even when at rest without chest/back pains). When there is no chest or back pain, the chest feels somewhat slightly tight or pressurised, even at rest or while sitting. There was one recent pain when I bent forward at a standing position, n there was pain spreading all over my left chest. I've never gone to a doctor fr this purpose as it doesn't affect my daily work. Can u plz give an approx idea about what might be wrong in my chest of anything at all?