when to stop?

everyone is telling me i should go ahead and stop working already. i wanted to wait until mid december and just put in my 2 weeks to "quit" cause i know they'll hire me back on. i don't get paid maternity leave so i'm not worried about having to come back right away or anything. my sister in law thinks i should stop working as soon as possible, my boyfriend told me to stop working in December. i'm due jan 11th and i'm a hairstylist so i'm on my feet all day. what's your guys' opinions????