Late Period , Negative Test

Dajah 💁 • Mon, Jun 27

Glow predicted period to start this past Wednesday. Didn't occur, so the morning after I took a test and it came negative. Waited a few days and took another Saturday and still negative. Took one today as well and again negative. Had sex on June 9th, and recently On Friday

Any thing that could help me understand please comment below thank you.