Your subject line interested me, "How do you hide what you are going through?" This is something I struggle with every day. Although generally my anxiety doesn't trigger a symptom like nausea/vomiting. In a cognitive behavioral therapy group, they always stressed how important it is to just pretend to be ok and the symptoms will pass, eventually. Last night at dinner with friends, my mind was spinning out of control. Somehow I pretended to be ok and got through, although it felt like hell.