every time I think I want to lose my weight, I become more fat than before

To get an accurate reading of your weight you should weight yourself in the mornrning, before breakfast (but after you go to the bathroom) and in as little clothes as possible. I wouldn't advise any drastic dieting, because then it's really difficult not to have the jo-jo effect and all the wight coming back. Instead, give up sweets, and start eating often (even 6 times a day), but less. And drink a lot of water, so you don't dehydrate. To succeed in losing weight, you have to work on your confidence, or no amount of lost weight will satisfy you. Good luck!