When did I ovulate?

I'm new to TTC and need some advice.

I have been tracking my cycles since December but this is my first cycle TTC. I'm only using CM to monitor ovulation. So I had EWCM on CD 16 then watery on CD 17 followed by nothing for two days. I felt like I had likely ovulated around CD 17 which puts me around 11 dpo. But yesterday I had a dull pain on my right side right where my ovary should be. I've been having very little creamy CM since CD 20. Was that ovulation pain? Or maybe from implantation?

When do you think I ovulated?