What the heck?

lauren
So glow says I should have started AF yesterday, (which already seemed like a few days later than she should have arrived)...but as of yesterday and now today. No AF so far. I took a test yesterday evening and it was negative. So where is AF!? I've seen a lot of women post about missing AF and getting negatives...but what could this be? My periods are pretty regular and now I'm feeling like somehow I've brainwashed myself into not having a period :/ this is my first month ttc and everything just got real confusing. Anyone have insight?