Last night I experienced sudden pain in my upper abdomen as well as in my middle back. It would sometimes radiate to my neck. Pain in chest would get worse when I would take a deep breath. Felt a little light headed. Prior to I played in a soccer game but had no injuries to my abdomen or back, just some soreness in legs and a bruise on the inner part of my right leg. Had sudden sharp pain through my right upper chest but it was quick, happened a few times and went away. I took naproxen to help with inflammation as I believed it was muscular. I also spit up a little bit of blood but am no longer today. This morning the pain was not as bad but I feel a slight tightness in my chest and shortness of breath. Felt a little light headed as well. Chest feels uncomfortable when taking deep breaths but not as bad as before I had taken the naproxen. Soreness in body is gone but right leg that has the bruise still slightly hurts when walking. Should I take another Naproxen? Is this anything to be concerned about? If so, what could this be?