Can I be?

Sooo I’m in a bit of a situation... I had a baby 3 weeks ago and me and my husband had sex last night... yeah it’s soon but whatever. Anyways i looked at my <a href="https://play.google.com/store/apps/details?id=com.glow.android">ovulation calendar</a> and guess what???? I ovulated yesterday!! He pulled out of course. But what’s the chances I’m pregnant or do I even ovulate the same day after having a baby?? If I am pregnant we will obviously love this baby no matter what but I just need to know the chances if any Sperm got in....