Anxious as f*%k

I just started a new job and today is going to be my first day.. any tips on how to help keep my anxiety in check? I can’t sleep, I feel like throwing up and I’m constantly going to the bathroom. Because of all of this stressing my body out my period is heavier.

I don’t know what to do, I want to work so baaaaaad and I don’t want my anxiety to control my life... tips???