Today is CD 20, and ovulation was around day 18. My cycle is always irregular: sometimes 30 days, so…

Today is CD 20, and ovulation was around day 18. My cycle is always irregular: sometimes 30 days, sometimes 45. But this time, my ovulation test was positive on CD 17. And then, as usual: bloating, pain on one side of my ovary, discharge. Now that ovulation has passed, my stomach has deflated, and I've started having lower back and lower abdominal pain, like before my period… I’ve never experienced anything like this before((( We're trying to conceive, so we had unprotected sex. Could this be related somehow? I don't know what to think😞