I suddenly had very sharp pain in the middle of my chest when i would breathe in. there was also pain in my upper back at the same time. thank you!

Chest pain: Chest pain: Chest pain can be for multiple reasons. Given your pain was sharp it likely is some type of musculoskeletal pain, however a pleuritic pain can be sharp too. Usually this is secondary to a viral process at this time of year. If you have risk factors for clotting: smoker, Birth control, family history of blood clots it could be a pulmonary embolut

Precordial catch: This is a relatively common occurrence termed "precordial catch". The exact cause is unknown but it is felt to be when a dry spot on the lung lining sticks to the wall of the chest and the stretching when you breathe in causes the sharp pain . These are benign and will do no harm but they are dramatic. The best way to handle it is to "bite the bullet" and rapidly breathe in deeply.