Going back to work when the baby arrives

I stopped working once I got pregnant due to how sick I was. I did try to apply at places once I started to feel better, but I never got any luck. Once they see the bump it’s like they immediately don’t want you. Now I’ve reached a point where I can’t stand for too long because my back starts to hurt, my feet start to swell & I get extremely dizzy & I’m reaching the end of my pregnancy anyway so it’s too late. How long after having your babies did you moms go looking for a job or go back to work?