So, TMI warning, but this past month I was on fluconazole for a yeast infection (my first ever), it was 3 doses. We were planning on having this upcoming month be our first month that we were ttc, but my period never came. I have never missed a period except for when I was pregnant and have always considered myself incredibly regular, but I am almost 3 days late now. I've never been late by more than 1 day. I took an hpt and got a bfn. What could be causing this?