I am a seventeen year old male, above my Adam's apple and slightly to the right, I have noticed a very hard and slightly painful lump. It moves when I swallow, and prevents certain neck/head movements. It is not on the outer skin "like a pimple would be" it's on the inside. I have absolutely no energy or desire to move, and I can't sleep well at night.. Any idea on what this may be and if the two are related?