Really bad morning sickness

So I’m about 6 weeks pregnant and I work as a full time nanny right now also a full time student. Starting this week I’ve had the absolute worst nausea. I throw up about 5-7 times a day and it sucks being at work trying to take care of a little one while constantly puking. Ive missed one day this week due to the nausea but I’m not sure if I should let the parent know that I’m pregnant? I’m afraid of missing more work but I know I need rest. What do I do?!

*ive also tried the sea bands, ginger gum, crackers you name it