gained 8 pounds quickly by doing lemon/maple/pepper...anyone know why?....terrified to try again

hi....
any advice much appreciated.

i did the lemon juice/maple syrup/pepper cleanse and gained weight quickly. Why? Please help. I want to do a cleanse but can't afford to gain weight. I am still trying desperately to loose the weight i gained the first time.
Was it water? Toxins? Thyroid problems?
Since then I have done many Liver Flushes and got a total of 1000 stones out. But the weight gain is horrible and i can't loose it.
All advice appreciated.
Kathy