By nothing... do you mean your SWF (Salt-Water-Flush) does not exit? Does it exit as water? Is the water colored? What color? How long does it take to exit?
If you are truly blocked, I would highly recommend you take some of that money you are saving on your bad natural health pro and spend it on a professional colonic. INTERVIEW your therapist beforehand, to be sure you are comfortable with him or her. Ask to SEE the equipment. It should be shiny and new, a closed system, and he or she should be proud to show you. Ask how many colonics the therapist has done, and what training they received. They should be PROUD to tell you, show you... or go find another one.
Anyhow, pro colonics can really move things along, so to speak, in your cleansing program. I could certainly not have done the work I have without them. A good colonic can answer many questions about the condition of your colon and any contents thereof, and a good colonic is a pleasant experience.
Your juice program sounds excellent. I would say go to ten days for sure, then see how you are feeling.