Hello, I've had a sharp, stabbing pain every so often that shoots near my shoulder blade and sometimes travels from my chest. It's really quick and happens at no specific time. I'm 24, male, very healthy. I hear that this symptom can be for lung cancer or a heart defect (I've had 4 EKGs, a stress EKG, and 2 chest x-rays which found nothing) so I'm worried about it now. It just started today. Anyone have this before?