On Sunday I thought I got my period but after changing tampon twice they were clean. Last night thought I got it for real and after changing tampon, wearing pad to bed and changing to tampon this morning, there is basically nothing. Took a test this morning and it’s a BFN. What could be going on? At this point I ovulated 14 days ago. I had EWCM and major ovulation cramping. My cycles have been regular 28 days for the last few months. I’m on cycle day 31 now.