I'm a healthy 16 year old male, but lately i've been getting this strange feeling about 2 inches under my adams apple. It kinda feels like a pressure/pulsation. I've also been getting this weird feeling down the center of my chest. It's hard to describe kind of like an airy fluttery feeling but not really. I'm under a tremendous amount of stress, but i'm not sure if that's what causing it. I have a doctors appointment in a week. Could this be anything serious.