About a week ago, I experienced about 2 days with an extremely runny nose-very little sneezing. I didn t know if I was getting a cold or having allergy problems. Toward the end of the third day (last Friday), I had about 2 degrees of fever. I took an antihistimine. The next day, I had a headache (what I thought was a sinus headache. It may have been caffeine withdrawal from not having my usual couple of cups of coffee the previous day.) The headache went away. But then I started feeling stopped up--when I blow, I have thick white, frothy mucus. It s more one the left side. How do I get the mucus thinned out? Does this sound like symptoms of an allergy? A cold? Like I said, I ve had very little sneezing--no more fever, just the few hours Friday evening. Thank you.