Ovulation pains early?

Hi ladies :) I'm in month 3 of TTC. I am on CD 13 today and had cramping yesterday and right sided ovarian pains today. Last cycle I had these same symptoms at CD 16&17. I think my cycles are still working on regulating but I'm trying to determine when the pains typically occur. Do you normally have this before / during / after ovulation in your own experience? I've read can be anytime, I typically have this about 3 days and then it stops. I have not tried opks yet as I'm trying to not add extra stress of perfect timing quite yet. Experiences appreciated. Hoping it's just a early ovulation this month!