My husband and I are TTC, and we had sex during, my ovulation time. I was supposed to start my period on the 20th, but I didn't and it pushed my start date to today, the 22nd. Well, I still haven't started and glow pushed my period start date back another 2 days!! I took a pregnancy test on Thursday (my original start day for my period) and it was negative. I get waves of nausea that don't last long. I'm just wondering if anyone else has gone through this. Could it just be a very late period? I'm always on time, so this is odd for me. Could it be a false negative? I used first response pregnancy test. My sister thinks I am mentally building myself up to be pregnant which she said could delay my period.