I'm always on time with my periods. I had my mirena taken out last August . And when I started having periods again , they are ALWAYS on time . To the point that if I'm supposed to start tomorrow, I will get it at 12:01 that morning . I had intercourse with my husband very early Friday morning and my period was due on Sunday . It's now Tuesday and no period. But all the symptoms were there . Horrible cramps. Tender breasts. My face broke out . The usual every month thing. But I still don't have my period. I took a test the day I was supposed to start and it was negative. Is it possible that I could have gotten pregnant , and if so would it have been too early to show on a HPT? Even though I've already missed my period??