First day back on earth. Why do I feel so yucky?

Hello everyone. Today is my first day off the Master-Cleanse after 10 days. I was feeling fairly well, until about 6 hours after waking and doing the organic orange juice. now I feel a little sluggish, and I am almost depressed. I guess my body is reverting back to an earthy kind of energy etc. More yang stuff and all that. does anyone have an idea or have you had a similar experience? I almost didn't want to stop fasting. In 1991 I did 24 days on the MC. but I just cannot maintain that level of energy. I do research, and literally have too much energy to concentrate when I read and review articles. Thanx. J. Tweet