Half days at work?

Good morning mamas and mamas to be! So I work at my job from 11am to about midnight or 1am. I am now 6 weeks pregnant and experience extreme nausea, morning sickness, and constant dizzy spells. I am overly tired I literally attempt to take a nap on my break. And I don't eat as I should because of the constant work. Any ideas as to what to do? Or how to help. My boss requires that we work these hours.