Sick at work

How does everyone cope with morning (or for me all day) sickness at work? I’ve tried all the normal stuff...ginger, peppermint, saltines, lemon, sipping water, etc. and nothing seems to be helping. I wish I could just go home but I can’t. I feel so bad I want to cry. Constant nausea and then vomiting about every half hour. My productivity has gone down and I don’t know how to help it.