Working full time and extreme fatigue

I am constantly tired and sick. I vomit most evenings and yes, I'm taking the Diclegis at night and morning. From the moment I wake up to when I go to bed, I'm nauseous, so tired, and just have no energy.

I don't know how to keep pushing through work every single day feeling like this. I have to be alert for my job and I'm afraid I'm going to make errors because I'm so sick. I'm actually starting to fall behind in my work because of the way I feel.

What do you all do during this time? How do you push through and continue working when you feel so sick? I'm only 7 weeks and have at least another month of this.

Thanks