When did I ovulate?

Amanda

Is FF correct by using my temps which says I ovulated on CD 18 (my temps have been all over the place- I try my best to take my temp at the same time every day). Or should I use the OPK and determine that I ovulated on CD 19 or 20? I had a really strong positive OPK on CD 19.

I’m stressed over that 2 day gap of intercourse:/