Help!!!!

I am 13 weeks pregnant and I work as a janitor from 6pm-2:30am and I have a toddler who is awake by 8 am. I am extremely exhausted. My job consists of cleaning 18 bathrooms each of which have 4/5 toilets/urinals, and 2 of them have 3 showers each. I also mop 2 hallways and 8 labs, And take out garbage from the labs. Is there anyway I can go on leave early or would I have to quit? TIA