You could still chart. Since you aren't actively TTCing at the moment, you can temp for a couple of months to see if there's a pattern starting at all - not neccesarily in days, but with your CM, and make sure that you are ovulating. I'd temp and keep track of my CM for a few months if I was you just to see. If you haven't already taken it & have never charted before, Fertility Friend has a charting course that will help you get started.
It sounds like when you were using the ovulation kits, that your body was trying to O and then didn't at that time, so it tried again and then you O'd. Temping would help you see whether or not you ovulated alongside the OPKs. The OPKs can only show that you are about to ovulate, the temping with charting your cervical mucus will confirm whether you did or not.