How to calm down Nausea?

So I’m in my first trimester. I’m 6 weeks today. This is the first day where I’m so nauseous my stomach hurts. And I want to throw up. The thing is no one at work knows and I don’t want to say anything for another 2 months. This morning I had water,my prenatal, yogurt and small cup of coffee. Same as always but I can’t even concentrate without gagging. Is there any way to calm it down. I also have a holiday work party right after work. Any advice will help! thank you!