I wad supposed to start my period yesterday. Usually I have light spotting and cramping for a few days before my official start date and then I fully start exactly on the expected date. Well, I've had no spotting no cramping, and I still haven't started. I always start on time so I decided to take a pregnancy test yesterday afternoon. It came back negative? I thought I'd start today but nope. I had a very miniscule amount of blood last night but it immediately stopped. Have any of you had false negatives after you've already missed your period? Should I retest? How long should I wait? I'm so nervous!