Do I start now?

Tisha • I'm a 30yo mama of 2 girls who are 6&8yo and most recently had a boy who was born on his dad's bday! I married my high school sweetheart. Been together for 16 amazing years. He's an army vet & mechanic, I'm an artist. I ❤ art & rock music. We live in a sm

So my fertile window starts today. Do we BD starting today or do we wait until my ovulation day? I have 2 girls but they were both surprise babies so I'm new to the whole tracking, and pinpointing everything. I do know that last month my ovulation day was on the 20th. Idk if that helps guess this one or when to start.