14 Days late BFN help please

I’m currently 14 days late and i’m never late. I’ve taken 6 tests and all have read BFN. I’m literally so nauseas all the time and have been cramping lightly but not extreme. Every time i try to google something to figure what could cause this i get no answers at all. For the first couple of days late i had very watery discharge and now it’s stretchy . Can someone please help?