How to loose weight its urgent plzzzzz?

ok i have gained a lot of weight in the past 1 month and since i'm 4'9'' thats even more terrible ...................................i llok obese and all my clothes are getting tighter ................ ...................all this is because i don't stick to a proper diet whenever i see any junk or oly food i can't resist my temptation and don't felling like eatting rotttis and sabbji (i mean a balance diet ) plzzzzzzzzz reccommend sum good exercise except cycling ............and how do i stick to a healthy diet ..............is hulla hooping good for weight loss