You can conceive if you are ovulating. Usually after a birth and delivery, you will return to your period in around 6-8 weeks following the delivery. THe most fertile days to get pregnant again are 14 days before your next period is due. I'd suggest that you start tracking your period and take precautions to avoid pregnancy by avoiding unprotected sex when you are ovulating.

yes, pulling out DOES NOT work. having sex during your period does not work (friend of mine is 30wks had sex during her period) condems do not always work either (i am 37wks prego with a condem baby) you can get pregnant once you start ovulating again which varies from women to women but typically around 6wks. by the way you can also get pregnant even if you are breastfeeding.