Thanks a bunch SassyLassie!!
Lots of these pains can due to a vertebral subluxation, meaning a misplaced vertebra in your neck and back. I have those and when I am in need of a treatment, the pain is really bad. Also, sometimes costochondritits can cause these feelings.
If it keeps up, I would see your doctor however, and also a good chiro, they can really do amazing things at times.