This is not the most pleasing subject matter, but the article was very informative. I am getting over one of the worst colds I have had in a while. I ended up going to see a doctor, and I was told that I had a sinus infection. I started getting sick and had a constant clear mucus drip, then over the days, my mucus colors ranged what seemed like a rainbow of colors. I actually had a fever, and I rarely get a fever.
My doctor ended up putting me on a series of antibiotics that last a few days to help my sinuses clear up. I am finally starting to feel better. I now know what to look for when I am getting sick and I will be sure to visit my doctor sooner. Thanks wiseGEEK.