I don't know anyone who did a longer fast. I knew some people who would fast for a few days. One did some kind of juice thing, she did it to detox and for a fresh start. I had another friend who would maybe go as long as a week if I remember right, and he did it for religious reasons. But neither of them keep in touch anymore.
However, if you google the word fasting, you get like 8,970,000 results. Of course we all know only a handful of them will have any useful or accurate information.
So really, I am no help at all! ha ha. However, I am attempting to completely revamp my life over the next few months, so I can probably relate to your reasoning. Self-control is a powerful tool, and one that escapes me. Good luck.
p.s--does your health insurance cover visits to natural/alternative medicine doctors? If they do, you might consider getting some information from them.