Can you get pregnant from pre-cum?

Annisa
Serious question. I have a 10month old LO and I had sex for the first time a couple of nights ago after having my son. I am not on birth control and we did use a condom the first time but we didn't have another condom the second time around so we decided to do the pull out method. I heard you can get pregnant off of pre-cum and I just wanted to know if it was true or not. Thank you in advance!