Day 4 was the hardest for me, because it is about the time your digestive system finally shuts down.  Before doing so, however, it tries one last time to get you to eat before finally going dormant.  Once it stops, then your body takes the energy normally used for digestion and begins the cleansing process.  Don't let those cleansing crises stop you from making your goal! 

I good reference to check out is www.freedomyou.com.  It has great great information on why your body behaves a certain way during the fast.  It will also help you know what to expect.  My first cleansing crisis was crazy and it really scared me at first until I realized that it was exactly what the website described to me.  I managed to get through it because I understood it.

You're doing great.  It gets a little easier (and more interesting) from here on out!