I have been having this dull discomfort pain in the center of my chest, what could this be?

See your doctor: Although given your age, it is an overwhelmingly small chance you have a serious heart or lung condition we doctors always get a bit concerned when someone complains of chest pain. You may need a few screening exams and a thourough history and physical to place you (and our) minds at ease. Seek emergency care if your pain worsens, you become sweaty, excessively nauseated or feel short of breath.