I always could tell when I was ovulating. I would get AF type pain mid cycle and sometimes it would last all the way to AF arrived. Although AF pain was much more intense. My O pain was a lot more subtle, more like an ache an usually on one side. I always felt my right ovary more so than my left too.
I did OPK's and when I got a positive I also had the O pain so I know that is what it was. That month we feel pregnant, first time trying so listen to your body maybe have a note in your diary of anything you notice then you will start to see a pattern.