yeah, you may be slighly lactose intolerant. i am and i take 3 lactaid pills with my whey. you may also be taking a whey product that has whey concetrate, which is inferior to isolate. also the product may have guar gums or fillers to thicken up the drink causing one to be bloated. id use natures best low carb isopure which is the cleanest isopure ive ever used. good luck
-c