A little confused?

So I've been extra careful to track my period and CM and cervix position this month. Glow has been a little off, my period started one day later than Glow said, and today was supposed to be my peak ovulation day, but my cervix is high, firm, and closed. We have had sex at least every other day. The point? I have had a bad case of acid reflux. I find it strange because I've never had it since I was pregnant before. I've also been slightly ore hungry, an fatigued out of my mind. Am I giving myself a hysterical pregnancy or might there be something else?