Around midnight last night I started to vomit "dry heave". I would get drenched in sweat, then id stop sweating then i would begin to drip with sweat again.. I did not feel sick previously, except for the fact that both my chest and lower abdomin have been in pain for more than a week now. At first around midnight I would vomit every 45 minutes, but then around 3 am it started hapening every 15 minutes or so, The dry heaves turned into pretty good amounts of a very BITTER bright yellow substance. I am still having the pains in my chest and abdomin, and within the past 2 hours I have began to lose my voice.