In my opinion this is a very pesonalized decision.
I would not make up my mind until day 30. On that day evaluate your progress against the goals you set to achieve. Is your tongue pink? How have you felt the past week? Is your skin still oily? Does your BM still smell like death? Can you stomach another lemonade? Did you lose an acceptable amount of weight? etc. If you feel that you could benefit from more cleansing I would take some time off eat right, exercise, perhaps do a liver cleanse or parasite cleanse then start another cleanse with a re-evaluation at day 10 to figure if I should stop or keep going. Make sure you come of the cleanse properly because if you don't you may spend the celebration on the toilet.
I plan on starting another fast on May 1st with P&B shakes because I can't stand the SWF. I would love to hear your results on day 30. Good luck.