Today I am 18dpo, still no af, and lots of neg tests. I am not sure what is going on. I am usually very regular, and always get my af 11-14dpo. I have slight menstrual cramping, but thats it. No sore BB's, nothing! My cervix is low and hard too. I assume af is on its way? My BBT temp dropped slightly, but not below my cover-line. Shouldn't i test positive by now, or is this wishful thinking. I had a m/c on 9/29, and really hope i conceived this time. And advise?