Why am i bleading pink and clear a week befor my period?Could i be pregnant?

hey, im woundering why am i bleeding pink.. with like whiteish clearish colered discharge me and my husband had a little thing unprotected just the "pull out" method on the 6th of this mnth.and now im feeling horrible like never before i get up fealing dizzy i feel sensative and my mood changes really strangly just today i was taking care of my nefue and you know at 6mths,old, throw up,pee smell i just ran to the restroom to throw everything i had in my stomick pleas help i have never had eny children and only heard about expeariances.Have eny idea what it could be?