What is considered late Ovulation?

Last month I ovulated on CD20 and had a 10 LP.

I don’t know why it’s so hard for us. This is actually the first time we are trying. I’ve had 7 pregnancies. I have a 6, 5 and 4 year old. Late 2016 I had a miscarriage and ever since then nothing.

So really my question is do yous think I could be ovulating late and the fact that my LP is 10 days, that’s it making it hard for us?