Testing for early ovulation

Has anyone had testing for early ovulation?

I'm getting EWCM on CD 9, or earlier. I used to get about 3 days of EWCM. In these months since my miscarriage, I now get one day of it.

My periods are 27/28 days.

I'm wondering if I'm ovulating too early, and what tests the doctor would do to determine if I am ovulating early.

Thanks in advance.