I am certainly not an expert, and I have probably read mostly the same things on this fast that you have, and we have been on the fast about the same period of time. From the holistic point-of-view your most recent coughing would be interpreted as the onset of the healing process. This view is quite easy for someone else to take. I would suggest that you evaluate your condition carefully and then decide for yourself the best course of action. While this diet can and has helped many people, it is certainly not for everyone. If you feel that your condition is worse than it has been in the past, I would have to recommend that you seek a health care professional, at least until you regain enough strength to attempt this or some other holistic remedy.