Another question about OPK's

[Annabelle4]

I've been using these green strip tests the past few days and finding them so confusing. I'm cd17 today and it's not unusual for my cycles to be 35 days.

I think they're negative, although I am getting a strongish second line, almost as strong as the control line, but this line takes up to a minute to develop. Am I right in saying that a positive line would instantly develop along with the control line, and be as dark or darker than it?

I've driven myself mad googling, so would appreciate any advice.

You generally ovulate about two weeks before af...

For me, the second line comes up immediately but it does take about a minute to get as dark as the control line for a positive...

Thank you physicskate.

I'll test over the next few days anyway.