I am 31 years old, fit and active. I have no symptoms of congestion or cough, but have brain fog, periodical headaches, and overall feel worse at night. I am still able to run in the evenings. Today is the seventh day and symptoms are persistent. In the last 3 years, I have fasted on three separate occasions for 12, 14, 16 days. I am seeking advice whether I should or not begin a water fast to speed up recovery.