Carpet question.

Hi everyone. I live in a 2 bedroom apartment with my husband 4 yr daughter and pregnant 27 week. since beginin i didnt like the carpets that already is in our apartment but they didnt chqnge it for us even those are in really bad condition. Now im decorating my kids room and thinking to put on top of those carpets area rugs. Do u think its going to be too kuch rug on top of carpet?