opk help

Hey! So my husband and I had sex early Friday morning. My opks have been like this:

Thursday night: negative

Friday afternoon: negative (almost positive)

Friday night: positive (lines equal)

Saturday afternoon: positive (lines equal)

Saturday evening (now): positive (test line much darker than the control.

So, do I ovulate 12-36 hours after my peak where the test line was darker than the control or from my first positive test?

Also, husband is now away for work. Are we out since we had sex before the positive test?

Thank you!!