I'm dealing with a weird issue where I cough up this jelly-like stuff that comes from deep in my chest. In the mornings, my spit has these dark brown-black specks and its a bit thicker than usual. Im 23 and used to smoke a lot but quit about two months ago because of this. I do have acid reflux, but its mostly under control. I'm worried and can't figure out why this is happening, and sometimes it's so thick that it makes me vomit. What could be going on?