chances of being pregnant

Savanna

so I think I just really wanna be pregnant again. but I just finished my period on Saturday and my ex boyfriend whos my babydaddy invited me and our son over and we had sex 🤦 he came in me 3 times that day and I'm not sure if he's trying to get me pregnant. anyways I breastfeed my 8 month old stil and I'm just wondering what are the chances of being pregnant and a good time to take a test