Quitting job

Is it bad to quit my job while I'm still early in my pregnancy? Like I already planned on quitting before i found out I was expecting because my job overworks me and expects me to keep breaking my back for them . But now since I've been pregnant this morning sickness has been kicking my ass and it literally makes it impossible for me to get thru my days at work . Idk I think I just need advice . Also , I start school next month and I also don't plan on being jobless during my whole pregnancy , just until my morning sickness starts getting better. What would you ladies do ?