The Most Weight You've Lost in 2 Weeks..

...I am trying to be healthy but tonight purged for the first time in a few months. I think I do it to try and cope with feelings of rejection or worthlessness? Has anybody overcome bulimia? I hate binges, how can I stop them! Also...I have 17 days to do a bikini shoot and my legs are fucking HUGE at the moment. Should I just eat only steamed veges? How much cardio should I do? I need answerssss