Do you get EWCM the day after ovulation?

[ParkayFloor]

I'm not temping and trying to work out when I ovulated this month. I usually ovulate a bit late around CD 18-21.

This month I had EWCM starting on day 13 up to and including day 19. Day 20 I had nothing. I was using OPKs but don't think I caught the surge properly as got an almost positive day 18 and the others were varying levels of lines but negative.

Would be really helpful to know if you think you ovulate on your last day of EWCM or if you get EWCM the day after ovulation too, thanks.