1 pound lost in 3 days is a little strange, but what was your starting weight? If you are not overweight or if you are underweight then you are going to lose weight slowly. Don't be discouraged though, try to stick to your fast!
I had the same problem in a previous fast, I felt so bloated I was almost to the point I thought I would have to take laxatives but I didn't. (DO NOT Take them during your fast)