Teaching and Morning Sickness

I am in my student teaching (in my state that's a full year internship). I'm nauseaus and can tell after being through this with my first morning sickness is going to hit hard. 
Any teachers out there have any advice? Especially not being on paid staff yet I don't want to be out sick or making waves. How are you able to calm it? I'm lucky enough I graduate mid April and due end of June! Whew!