rest and heal. Never compare yourself to others, when it comes to water fasting. What goes on with you is YOUR normal, and it always changes also. Rest is the very best approach -- get as much as you can, with eyes closed, as it contributes greatly to healing.
When you can, also try to get a lot of fresh air, some sun, and some full, deep breathing. People forget that we are essentially oxygen-based, and breathing is all important, for oxygenating the body. Also, the lungs are one of the four main eleminative organs.