Waitressing while pregnant in third trimester?!

How do you guys manage to get though? I currently only work 3 days a week, but I work 9-10 hour days at a place that I’m very busy and we are understaffed. By the end of the day my butt, and back hurt so bad that it hurts to walk. I often get a ton of Braxton Hicks contractions by the end of the day also that make it really uncomfortable but I’ve been getting those for months now. Just worse in severity. I did notice the other day I had bad pelvic pressure and pain at the front of my couch. This was new and it made it hard to walk. I have a toddler at home so I can’t exactly go home and relax. I’m only 28 weeks, so it makes me nervous to wonder how bad this is really going to get.