Ovulation question

So last month I ovulated later than I should have (about 5 days later). This month glow is showing that I'm currently 4 days from ovulation, but I'm pretty sure I ovulated yesterday or the day before (high/soft/open cervix and ewcm) Today I've got watery/creamy cm my cervix has dropped, it's more firm and not so open. I'd assumed that since I ovulated later last month I'd ovulate around the same time this month (when glow says I will) but it's it possible that last months cycle was a fluke and this month my cycle is going to continue on like it did prior to last month?