yes you can get pregnant easily. you can get plan b.

anytime you have unprotected sex you are likely to get pregnant

It's a greater possibility because after you have the baby you we as women become very fertile that's why they suggest no sex until after the 6 week check up but to be safe to make sure you aren't you can get plan b within the next 4 days

Without protection? Then yes u could possibly get pregnant, you are more fertile after having a baby... I would suggest getting on some birth control or using protection unless u want back to back kids

It's highly possible. You're the most fertile after a baby