Anyone work in a restaurant?

Hey ladies! I'm almost 19 weeks and about to start a job as a host at a busy restaurant. I live in a tourist town so it's that kinda busy lol anyway I've been home my whole pregnancy so far because between having Crohn's disease and being pregnant I've had no energy whatsoever and feeling horrible. I'm feeling better now but worry how bad this job will wear me out. I need to work until baby gets here, so I know the bigger I get the harder it is. Ive been thru the pregnancy thing before but didn't work at that time. Just wondering if anyone has any tips on making sure you take care of yourself while working or if it's not as bad as I'm worrying that it will be? Lol also nervous to tell them I'm pregnant, I haven't yet 😬