Hi spicy I'm also just off the pill, but today is CD42 for me. Early on in my cycle I thought I O'd based on EWCM moderate cramps and a little bit of spotting... but after CD30 came around and still no AF or BFP I started charting my temps and using OPK's. Just a few days ago I finally got a postive OPK with no significant signs of O, not to mention i had obky a little bit of sticky/creamy CM. Then, late that night I experienced the most painful type of cramping I've had since labor! My entire uterus felt sore and bruised and hurt to touch, bend, breathe, etc. I was woken up in the middle of the night with upper thigh pain with this cramping and backache, I couldn't move for 30 mins! My next OPK was back to negative the next morning and then my temp spiked. Had I not been testing multiple times a day, I would have missed the surge!
I am new to OPK's and charting, but have learned tons from the ladies here already! I think you should keep testing until you get a positive, and if you are not already, test at a least twice per day. The postive OPK means that your body is trying to release the egg, you can't really confirm that you've O'd unless you're charting temps as well. Good luck!!