AF was due today

I have a 27 day cycle. 14 day lp. I DO NOT basal temp. But glow is usually always on point with when my period starts. According to glow, AF is due today. But she decided not to show yet. And I'm a little confused. For the past 2 days I have been feeling mild, period-like cramps. Also the past 2 mornings I had a loose BM after I woke up.( kinda like diarrhea). Also in the middle of the night I'll wake up to horrible stomach pain. (Definitely caused by gas) I've taken 2 hpt. Yesterday was 13 dpo. Today's used with FMU. but both were negative. Not sure what's going on. Was wandering if anyone went thru this and actually tested positive after 2 bfn? Also wandering if anyone has had these symptoms before