Anyone ever ovulate around CD 30?

Kristy
This is my 3rd month TTC. The first month my cycle was 38 days, second month is was 34 days.  Today is cycle day 38 and still no AF. I tested CD 35 and got a negative. But i looked back on my calendar and the only day i had ewcm was CD 30. So im questioning if i ovulated really late. Which means CD 35 was way too early to test. Anyone's  advice or guesses would be greatly appreciated. 😊