Question: what do you do when you feel like throwing up but can't?
Answer: Breathe deeply. Rest quietly and relax while you take long, deep breaths in. ... 
Eat a small snack. Try eating a few bites something bland, such as dry toast or crackers, to soothe an upset stomach.
Apply pressure to your wrist. Pressing gently on certain pressure points may help reduce nausea.
Cool down.