TTC and Ovulation help

My period was the 8th -12th

Ovulation is 2 weeks from the first day of my cycle which was the 8th so ovulation should've been the 22nd...correct? I have been taken ovulation tests everyday since the 21st always getting a FAINT FAINT double line. The control being darker and test faint.... what's going on? HELP PLEASE

Update: yes my cycles are very regular.

On rare occasions I have started the 4th-8th