When did you start leave?

I’m 32 weeks and was planning to work until 37 weeks but recently been getting really bad back/leg pains as well as a bit of cramping here and there with BH. I am a waitress and am constantly on my feet all day long barley get to sit for 20 min for a lunch than back at it again. Granted I work 4 days a week 2 of those days only 4 hours and the other 2 days 7 hours but I’m still dying. Wondering when you waitressing ladies started your leave ?!? My doctor also said ladies in that job field end up having to stop work earlier than ladies with other jobs.