Working with bad nausea/vomiting

Thank God that I am a computer lab teacher, so I’m not constantly with my students, but this whole puking between classes is getting old. All the teachers are gawking at me asking if I’m ok and I’m here thinking “NO! My vampire baby is killing me!” 🤣 I’ve already missed work a couple times in the last two weeks. I can’t get myself to ask for much needed time off. I’m too scared to lose my job. My last pregnancy, I didn’t work for the first 20 weeks. Now I know how incredibly lucky I was. My butt is being kicked. Seriously. How do we do this? 😩