Bet that was uncomfortable sparkle, I've been there and got the t shirt. If you do fancy trying the juice, I'd start with small quantities then you won't overload your digestive system and also stick to veggies you know you're ok with.
As I juice rather than make smoothies I find I have quite a bit of pulp left in the juicer so, sometimes I freeze it in ice cube trays then add it to my homemade soups later on. Waste not, want not.