first - please eliminate the P&B shakes right away -- this is not part of the cleanse and may be harmful to what you're doing.
second-no enema's -- this is why you feel so bad.
third - you MUST drink water constantly. I have 60 oz of fiji water on my desk that I will drink before I leave work today. This in addition to the 64 oz. of my lemonaid -- plus two 8 oz. cups of smooth move tea. I get 140 oz. of liquid in a day. Today is day 4 for me and I've already eliminated twice (mostly liquids - but that's to be expected).
Foremost you need to up the liquids asap and try to reverse the problems raised by the PB and Enema.