I would think that you were probably not that toxic to begin with. I am only on Day 2 of the cleanse, so my advice is novice, but I would think that if you can go the three more days then you should.
No matter what your body is going through a cleansing process, even if you do not have many signs. I have read a few stories of those who did not see the results during the fast but after fnishing the 10 days or so and cycling off the cleanse in a proper way were surprised to feel the benefits in the next week or so.
You have been doing a great thing for body and good for you for getting to 7 days. Only you know what is best for your body so listen to it, but if you decide to go off, then my advice would be to do it very carefully. Here is a website for coming off the cleanse that might help you.