Feeling down :-(

Hayley
So I was due 10/7 but been having pg symptoms a week before , headache , nauseous , sore boobs , slight cramping.  I am always regular , there was no sign of  AF on the 7th but got BFN , yesterday I had strange pink CM that was there when wiped but then nothing ! Usually I start my AF brown and it turns heavy within a day today it's just CM with a slight discolour. ?? But more white !!  Anyone got any advice ? As what the hell is going on ?