Hello, congratulations for the duration of your fasting: it is quite impressive, and is psychologically strengthening to resist the call for food when you have it below your nose. I'm currently on day 11 and had several occasion when i've felt prone to give up.
Now, i've read you sometimes drink coffee, but i'd like to warn you that coffee may be an appetite suppressant and it may hide a real hunger feeling; also coffee is a prebiotic food which may act as a "food" for intestinal microbiota, which in turn will produce energy for the body. It is also quite acid on the stomach.
Also given the duration of the fasting be careful to interrupt it if any symptom shows up, and remember you can always do another fasting after this one.
Aside from my 2 cents on this, good job!