ever since around one or so months ago every time i go to the gym to lift some weights, after i finish my warm ups and move onto the real stuff i quickly become fealing really really sick (stomach pains) and end up having to go to the toilets and throwing up 'nothing' , like the thing im throwing up tastes and looks like Sprite ( the drink made by coke ) :| and i havnt had sprite in like 2 years. Ive tried having different eatting patterns but it still happens. I dont use enhancers/steroids and i stretch and warm up before lifting the heavy stuff. Any ideas?