WTH!? Confused, grrrr!

Melissa

So AF was a few days late this cycle. Apparently that lengthened my Luteal Phase and made my entire fertile week offset from the days I BD so that I had no chance of getting pregnant last month! Help! How am I supposed to know when I ovulate if a late period will change my estimated fertile window?! I guess I will have to start using OPKs? 😭