Fasting is such a dangerous game

I losted over 60lbs last year from fasting and changing my whole diet. Back in august i tried a 8 day fast succeeded but that made me get out of control almost right after i ended it i was at 146 with a starting weight of 210 , and now im back up to 206 with joint pains, insecurities and depression. I wish i could rewind the time. Ive done more damage to my body then from when i was at my starting. ive lost so much hope