Hi Wickedlylu,
very good advice from Kemosobbie and Mouseclick.
I would strongly urge you to heed their advice in your own interests.
Just one thing I would like to add is that it has never been considered wise to set an arbitrary number of days for water fasting, as developments can dictate a much shorter one than the one you have planned.
I would follow Mouseclicks advice to the letter and where the benefits are the same but over a slightly longer period of time.
As experienced fasters who have a great deal of knowledge of the subject, we are only concerned as to what is in your own best interests.