you don't have to live without sweets, just try cleaning up your diet a bit so you have less carbs and more veggies + fruits! a good tip my mom gave me and i've always followed it: try not to drink your calories! it's better to have a glass of water than a sugary drink with your meal. also: stick to a simple workout routine 3 days a week. you may not get major results in the short amount of time that you have, but it will make you feel good about your body, and that's what matters!