First trimester and work

Is there anyone else who is struggling through their first trimester while working? I am a special ed teacher and have barely any time to myself in my schedule. I am only 6 weeks and my nausea is starting to get bad. The fatigue is unlike anything I’ve experienced. On top of it all, not being able to tell colleagues and feeling guilty for not doing my best work is a real struggle. Anyone else experiencing something similar? What do you do to cope?