Just wondering.....does this happen every time you do cardio? If so, do you notice anything in particular that you do on those days you get thise feeling that could be a contributing factor to this feeling? Does it happen after you eat certain foods? or when you don't wait a certain time period or wait too long after meals?
I sometimes just have days where I feel like this, well it doesn't happen as much as it use to, but I still would feel sick if I did cardio after eating some foods or after waiting too little after I ate.