Please explain. I'm confused.

I'm so very confused.

My period ended on the 3rd. Fertile window started on the 5th, so I began my ovulation tests. Tested twice a day, with two days of faint lines, but today nothing! Could I have ovulated the day right after my period?!?!

Glow is predicting ovulation day to be this coming Friday (the 9th). I've been having twinges and cramps to my right, slightly sore breasts, mild headaches. Could be ovulation symptoms. But tests are coming up blank :-/