I recently been getting a pain in my chest more in the armpit/breast area. its comes a goes. more of an ache rather than a sharp pain.

Musclular pain. : sounds like inflammatory pain. Try not to do too any stretching or pull up type of exercise. You may apply Ice take Advil (ibuprofen) to reduce the pain or massage with Ben Gay. You will get better. Watch for cough and fever etc. then you need to get examined.

Muscle pain: Most likely you are having some kind of muscle rib pain caused by inflammation from minor trauma. The trauma could be from the hard wire of a bra. Start taking ibuprofen 600-800 mg every 6-8 hour around the O"clock for the next 5-7 days,and apply heat pad few times a day. If the pain becomes so bad make you have a cold sweat,or it become worst and more frequent,see a doctor.