I just started taking it this morning before working out and the energy level was amazing. However, about halfway through the workout i got pretty sick to my stomach and thought i was gonna throw up. 2 things to note.. I took it on an empty stomach and i'm relatively new to supplements. My question is should i eat something small with it, like maybe a piece of toast and jelly or a banana? or is it just my body not being used to the caffeine because i havent been using supplements? also what do you guys think about taking it on cardio days?