If you knew that the mithaai would kill you, you would have no problem foregoing it, would you?
Too much sugar can give you diabetes, but it takes a long time. Immediately, it will give you pimples, yeast infections, mood swings, and pretty quickly it will rot your teeth.
I have also read that taking vitamin B5 (pantothenic acid) can reduce sugar cravings, but I have not tested this personally.
If this is a big recent change – you say you never were into sweets before – then that is something that a proper homeopathic doctor can fix. Find a homeopath.