Is this a positive opk on clomid and metformin?

Hi. I'm currently on my 3rd cycle of clomid and metformin and on Thursday had a scan showing a 15mm follicle. We have been bd every other day all weekend and I Started doing opk yesterday. I don't normally do them as I have pcos and they never normally work but would you say this is a positive? From left to right was yesterday, this morning and tonight. TIA x