Advice please...

Since I ovulated I've had thick white cm, I've read I know I shouldn't but I can't help my self,, that if your egg has been fertilised your cm is thick white creamy? But after ov it's supposed to dry up if af on the way? Is this correct? I have one light positive but tested since and 3 bfn, no af yet until 4th may! Please help or any advice appreciated.