I'm so glad you posted this because that's exactly how I felt. I was scared to death, fear of throwing up, fear of a panic attack, just plain old fear of the unknown. I actually thought the OO/grapefruit was good too (but I was really, really thirsty also). The ES left a lot to be desired though--hoo boy.
Although I can't find an answer to exactly what it was that came out of me (piles of green stuff with balls and stones in it), I'm assuming it was what it was supposed to be and that I had/have a really full liver. I'm exciting about doing the next one--which would have been this coming weekend, but I won't be around, so I guess it will be the next instead.
Congratulations on taking that first step---now all that's left is reaping the rewards!! :)