Day 21 My ups and downs

I am now on day 21 and I am having a really hard time the last 24 hours. I couldn't sleep last night I was felling very agitated and genuinely craving food (not just letting my mind think about it.) I had originally wanted to do between 25 and 28 days but after throwing up my swf this morning, not sleeping and had very low energy thru my workout I am seriously considering stopping. The worst thing is that I have not nearly lost the weight I wanted to. I am still 30 lbs overweight it is really depressing to hear how much weight other people lost in a much shorter period of time. I have lost only 11 lbs and I have been working out EVERYDAY since starting mc, doing; 1-1 and a 1/2 hours of cardio everyday with some light weights, pilates and yoga twice a week each. I have been burning 500+ cals per day in the gym. On the positive side throught most of my fast I have never felt better in my life all my senses are improved my mind and thinking is much clearer and my energy level is amazing, minus yesterday. Is it possible there is something else wrong with me? I read that parasites can keep you from gaining or losing weight. I plan to start pc shortly after my mc followed by a liver flush. Any suggestions as to how and when to finish my cleanse would by truly appreciated. Also has anyone else experienced mood swings?