Today is my third full day on the Atkins 20, and prior to this evening the only side effect I have had was lacking sleep and an occasional headache. Tonight I am feeling nauseous as ever, and I dread it is the above mentioned keto flu. I will preface this by saying I am close to 400 pounds and have stayed under 12 g of carbohydrates all three days to this point. I am drinking water like it is going out of style, in fact no less than 10 cups per day. Any advice here as this is the one symptom I did not want to have, the nausea and/or vomiting.