Hi, I'm 18 and have been experiencing a lot of chest pain recently. I've had a few 'stabbing sensations' over the past week; yesterday I experienced some dull pain off and on throughout the day, and today it has been severe pain. It hurts no matter what I do, but is slightly improved when I hold still. Any idea what this could be?

Chest pain is too vague. Your heart is left to middle, your gallbladder is right, your esophagus is middle (acid reflux, hiatal hernia), and your stomach is all across, although gas rises up under your heart on the left. And you have major muscles there that can strain. That's just for starters. So go to your doctor or a walk in clinic. Do you have any coverage at all?