Right. Last week, I was sick with a sore throat and fever and whatnot, and on towards the weekend, I started getting better, and that's when I nose got all runny and stuffy, and I started coughing. Well, as of this morning, I noticed that when I cough up mucus, there's blood in it! When it's just a dry cough (no mucus coming up), there's no blood. But whenever I hack up a lot of snot, there's blood in it! It's not a whole lot of blood, and I don't feel like I'm about to drown inside my lungs or anything (bleeding inside the lungs), plus a co-worker told me it was just sinuses, and they could do that (which it probably is). However, it HAS gone on all day. So, should I wait and see if the bleeding stops, or is it time to head for the emergency room??