So I know it's different for every woman, but I'm just curious when is the most common time frame of when you ladies stopped or plan to stop working while pregnant?

I am currently 19 weeks and would like to work as long as I could, but I have a lot of pains that make it hard to work. I'm a server/hostess and just walking around to seat people makes me hurt so bad at the end of the night. I already have called into work once due to pains before I had to go in cause I don't wanna be doubled over in pain or stress the baby out or anything. I wanted to call in last week one day too cause of hurting but ended up going in anyways and i did way too much and hurt so bad after. My husband says it's up to me when I stop working..