Hi, Welcome to Health care magic forum.
Why do you worry about the 5 liters of water, you drink, the amount water you feel to drink, and some more. It is written you should not drink, more than 5 liters, and not for 5 liters.
You can keep weight under control by minimizing the intake of calories, fats,fries, junk foods, and oily foods.
Increase your activity by practicing, morning walk,
yoga, gardening, and do any work in front of you.
Minimize the sleeping time ,practice late to bed, and early to rise, avoid day time sleep.
Wishing for a quick and complete recovery. Thank you.