Just a though as I drank a lot of protein drinks before surgery after lifting weights. Try mixing them with water instead of milk if you aren't already and add extra water if they are still too sweet. It helps a lot as they are sometimes too sweet for me as well. Also not sure what protein powder you have but I use Jay Robb, it is the cleanest and probably the most pure you can get in stores (there are a few others that you can only get online) and tastes good.