Early ovulation??

Please help! And stop me if I sound crazy. I don’t use OPKs and I don’t track bbt. I may sound ridiculous but I have a pretty strong sense of when I am ovulating. (My mother and sister are aware of their ovulation as well). I can almost always tell by the cramps and discomfort (very mild, but I do notice, and it’s always to the sides of my uterus) as well as increased and noticeably EW-ish CM.

This month my period ended on the 16th and I’m pretty sure I ovulated on the 20th. Is this possible? Has anyone else experienced this?