1st Sign Of AF?!!

Chaundra
So AF is due on Dec 6 and today I had a lot of creamy cm but in it had what looked like a single small string of red (blood) I'm starting to get completely bummed! Is that a sign that AF is coming? Isn't IB brownish? I thought I was pregnant because of some weird symptoms I've had for about a week! Anyone had this before or have any thoughts? Please?