Hostess while 29 weeks pregnant!

Am
So just a little background info! I'm currently 19 and I'm 29 weeks pregnant. I've been living with my mom and she hasn't made me pay for anything such as rent etc. I'm grateful and blessed beyond words. Recently she had her good friend who is the owner of a restaurant hire me to be a hostess. Again I'm grateful, but I tried explaining to my mom that I don't know how working this late in my pregnancy will benefit. She has the mindset that I'm gonna pop my son out and go straight to work. This is my first baby so I'm just not sure how to go about this. Any advice?