Your weight really doesn't matter, it's how much fat stores you have that's important. As long as you have stores left to live on you are fasting and doing a good thing for your body so don't be concerned about the numbers on the scales. When you run out of stores you will definitely feel hungry again, then just be prepared to break your fast properly. If you lose more weight while detoxing than your body would normally carry for good health it will soon replace it with good quality stores during your refeeding.