So tired!

My boyfriend doesn't understand how tired I am now that I went back to work I have anemia and I'm 15 weeks pregnant I work from 4:00pm-1am and I literally feel like shit all the time! My body aches 24/7 especially my back I'm not trying to complain because I don't like depending on anyone and love having my own money but I don't know what to do to regain at least a little bit more of my energy back I drink fruit smoothies everyday I take my vitamins as I was instructed and try to sleep when I can. Is there anything you women tried to get a little bit more energy?