How Easy Is It Really

Can you really get pregnant super easy after having a baby I'm 4 months pp and 3 day in a row me and my husband had unprotected sex over 5 times. but don't you need to be ovulating to get pregnant...why do they say its super easy to get pregnant after having a baby... can you get pregnant even if you don't ovulate???? Or do we ovulate multiple times or something??? Because people make it seem like any day of the week that you sex after having a baby your automatically going to get pregnant again.