Feeling a little frustrated with my tracking

Sa
I downloaded Glow a little over a month ago to track my cycles and, hopefully, aid in getting pregnant. This month, my period didn't even start until two days AFTER Glow said it should be over. Now, it's telling me, today, my fertile window starts.... but I'm on my period and it just started two days ago. I still have about three more days of this crap. This is just so frustrating. I wish that my body worked correctly. I just wish we could get pregnant easily, like so many other couples.