DID I MISS OVULATION? Help!!

So I've recently started using opk's after 2 mc and 3 cp. they were very faint on a daily basis. I work a lot so do them whenever I can.

On Thursday (cd 10) I got an almost positive opk - the second from bottom. I obviously BD, as I knew i could ovulate shortly after. I was working away yesterday and stayed away the night. I came home tonight, Saturday (cd 12) and did an opk - the bottom one.

My question is, looking at these, do you think that I would have got a positive yesterday, CD 11? Or do you think my LH could be fluctuating causing mixed results?

According to Glow my ovulation day is Monday. However, Flo says tomorrow.

Was so looking forward to seeing a positive opk.

Is there any point in me doing them for the rest of the month? Have I already missed the positive?

Will I still be fertile or can I rest for the rest of the month now?