Feeling weird!

So I have taken three tests, all BFN. af is due 12/10. What's weird is I generally feel very strong af symptoms, like boobs are very tender,  a few days up to my period. This  time, my boobs feel completely normal. I keep cramping and feeling like af is supposed to start, but when I go to the bathroom, nothing. (And I use do not get cramps prior to AF normally). I guess I'm just confused. And sad because I really thought this was my month!