Opk questions PLEASE HELP

So I got my peak opk yesterday morning. I have tested this morning and at lunch time and it's still positive but not peak. Does this mean the egg has been released? And what are my chances if I had sex then the day after I got my positive opk but didn't have sex that day, and had sex today (day after positive opk).

I've been searching and trying to find out how it all works but I'm getting mixed info. Does the egg release when the opk turns negative? Since it is still postive but not peak does this mean I'm still waiting for the egg to be released?

Do I have a good chance considering I had sex today and it's still positive?