What Causes Tingling In Throat Followed By Coughing And Vomiting?

I have been getting this tingling feeling in my throat, which usually leads to the coughing, then the gagging begins. I have vomited a couple times, had some diarehha (sp), weak and not wanting to do anything, nausea, and nothing seems to be working. Can you please help me figure out whats going on?