Please help not sure if iv ov'd or not

[Mum2b5]

Im so confused. Started testing with leftover sticks from cb dogi opk at cd8. Got pos cd9 (which is early for me usually 31 day cycle and ov late in month) kept using opk and got negs. As i got pos early i got the cb dual hormone opk and got another cb digi as had run out. On cd 14 i got neg with digi abd ashing on dual hormone. Cd 15 neg digi but pos dual then today cd16 neg on digi again (dual stays pos for 2days so cant use anymore ) dont have a clue whats going on?!