hi.. my names chad i train very hard twice a day boxing in morning and weight training intesely in evenings .. im on preworkout stimulent a during workout amino bcaa vit drink and a post work out shake with whey protein i also take alpha test testosterone natural supliment and glutamine and vitamin b complex tabs 1 a day every day as well as creatine ... my problem is during the boxing and thats intense cardio im 100 % fine never had a problem its the weight training in the evening when i train i get extreamly dizzy and my heart completely cramps up like short successions 1 or 2 or 3 of them almost feels like its going to stop then i breath deap and it comes back to normal but i feel really bad afterwards and dizzy lightheaded ... should i be worried ? is it a heart condition or do u think its me over training ? im now paranoid looking tuff up on internet i went for a ekg stress test at doc said heart was ok but it continues to happen am i gonna die?