I also experienced lack of appetite for several days, but on like day 4 I ate like I couldn't get enough. The tough part in the first few days was the unquenchable thirst for fluid. It didn't seem to matter how much i drank, I was still thirsty and chapped. For me I'm usually done with the worst after day 3. Hang in there and stay strong. It's not fun but try and occupy your time and be positive about what awaits after this hell