Its different for everyone, going on knowing your body a lot of people dont know when they are ovulating. This included me, however I do get ovulation pain which I thought was ibs lol as if did affect my bowels, it was only when I started using opk I realised everthing time I got a positive opk I was in pain, however I'm a firm believer in temping, so I temp as well and this confirms ovulation.
When I tried to conceive my son, I used opk's from calender day 10 onwards, I had a gradual increase which was good, so when I seen my opk get darker the baby dancing started, I did this right past the positive opk and 1st day of temp rise which confirmed ovulation, the more you practise the more you get in tune with your body too, you start to notice how you feel around ovulation. I know even without using opks and temping now but its a very good place to start as not everyone experiences pain, but you might have other symptoms that you would never have noticed before. Good luck xx