Lulu (http://ginandtrouble.blogspot.com/) left a very encouraging comment, but also asked about metabolism and whether I'm worried about it dropping. This is definitely an issue with fasting. It will cause your metabolism to slow down significantly. This is why breaking a fast can actually be harder than doing the fast.
It's incredibly easy to gain weight after a fast, as I found out after my last one. The important thing is to very slowly reintroduce foods to your body, starting with nutrient dense, low calorie foods such as raw fruits and vegetables. Your metabolism will go back up if you give it time. Also weight training is a great way to increase your metabolism.
When I was doing all my research about fasting and the benefits, I read that fasting cleans out your body so well that it is able to run better. It said that it can actually improve your metabolism in the long run, though this is assuming you don't immediately pollute your body with bad foods right after the fast.
Basically a successful fast depends as much on the weeks after as it does on the weeks during. I'm still trying to figure out when I'm going to end mine. I'm thinking that I will end it on Sunday the 5th of April. That will give me two weeks before my boyfriend's birthday to work my way up to a more normal diet. Hopefully I can avoid gaining after the fast.
I hope this answers your question, Lulu. And I hope you're not scared away from fasting. I still think it is quite a powerful weight loss method. Thanks so much to other commenters!
Stay strong and beautiful ladies! <3