How soon to try for another baby


I’m 31 my husband is 33. I’m thinking I want to try for another baby. Just had our second in July of this year. My first is 9. I don’t want to wait to long before having another one if it’s meant to happen. When did you all start trying for your next baby? Also I am breastfeeding right now. Is it even possible to get pregnant while breastfeeding? Has it happened to anyone?