My chest hurts when I breathe in deep.
I am not sick, does this mean I am getting sick? Colds and the flu have been going around school.
Should I be concerned that its something more serious?
No cough, or sickness. I would say the pain is in the center of my chest
This is probably not serious.
If it hurts in the center of your chest, it's probably costoshondritis--inflammation of the cartilage that connects the ribs to the breast bone.
Antiinflammatories like Advil or Aleve should help it resolve in a few days. Of course, if you develop cough or fever, you should see a physician for evaluation.