I have some new symptoms now. For the past few days I've been getting very bad headaches behind my eyes, sometimes on just the right side. My right eyelid has drooped slightly. The headaches usually happen more severly after I eat but there is a constant dull ache accompanied with fatigue. This morning I felt phlegm coming from the back of my nose and spit it out and it was pure bloody mucus. It is not coming from the front of my nose, just draining down the back. I don't have a cold or cough or anything with it other than the headaches. I've never had sinus problems before. Is this something I should go in for or keep an eye on?