You should ovulate 24-48 hours after the first + OPK. So you very well could have just ovulated on Monday morning. Some people get ovulation pain before ovulation, after ovulation, or right as they are ovulating. So the pain may have been pre-ovulatory (not sure if that's a word but it sounds good lol). Hope that helps! SSBD!
I have never temp'd but after you ovulate your temp should rise and stay up until it's time for AF I believe. I can tell you a positive opk means you "should" ovulate soon. I only bd'd once the day before my positive opk and got prego. There are lots of people on here that have temp'd for a long time they can probably give you better info. Good luck & SSBD