day 6, need some encouragement!

I'm on day 6 of the cleanse, and am hoping to go either 7 to 10 days. But at the moment I'm not feeling very well. My legs have been cramping frequently, especially at night, so I'm not sleeping very well. I'm also feeling rather listless and cross. In addition, the weight loss I had the first few days was so encouraging, but for the last two days nothing has been happening.

Is this a sign of detoxification going on, or am I having problems? This is the first time I've done a cleanse, so I really don't know what to expect.