Been sick and haven't worked out for a week. I am so afraid of shrinking, as I hit 76kg for the first time in my life and was so happy about it. same here. yesterday, I finally got my appetite back and my fever went away. it's all a part of the game. I lost 6 pounds in the first 2-3 days. I wouldn't worry if you lost any. it's just mostly water and maybe a little bit of fat if you're running a fever.