always late sleeping schedule 3am-5am

mommies i really need your advice because im a first time mom, im already 31 wks pregnant. and as far as i can remember the last time that i went to sleep early was when i had my first trimester. and the whole 2nd trimester up to this point im really having a hard time sleeping early, i sleep around 3am 4am or 5am already and im afraid what will be the effect of it to my baby?😢😢