Yes, get rid of that drink. It's 300 calories at least probably and you don't know whether it's spiking other cravings, even for healthy food. You can replace it with a SF option but honestly the best thing is probably to cut it off completely and try to lose your taste for it. Other than that your body might be just catching up with your past loss. And if you've only recently (within a month) started the exercise program, your muscles will be retaining water.