What are the chances

Rach • Mommy to a 7yo 👧🏼 and new born 👶🏼 boy
I have found that the "green" ovulation days have been pretty right as far as predicting when I ovulate. I ovulated some time between Wednesday and Thursday. Yesterday we decided to stop preventing pregnancy. What are my chances of being pregnant? I've had baby fever for some time now, my daughter is turning 3 soon and I want to have another. He is ready too so I'm really hoping I get pregnant. But don't want to get my hopes up.