Neck pain and how to deal with it?

So recently my neck has been achy/sore/pain whenever I raise my head and look up. Can it be because I slouch a lot or when I lay on my bed, I put a pillow behind my back for some support when I'm gaming. Is this anything serious like a hunched back or some sort of neck problems? And what type of doctor should I go to in order to check this out: chiropractor? orthopedic? what?