Help! Spotting and mild cramping, day before Glow says AF due



If I go off Glow then AF is due tomorrow. However my BBT didn't rise after predicted ovulation date and I had EWCM last Wednesday.

I thought AF was a day early as had a streak of bright red and minor cramping. But nothing since. Also been mega emotional and randomly cried twice today!

Any thoughts? Could it be implantation bleeding? Anyone had this then BFP?

Had a BFN a couple of days ago.

Thanks 😊