Good for you for admitting that the bingeing and purging aren't good for you and for seeking help. You have taken such a huge step, one that I know isn't always easy. It sounds like you have or are developing an eating disorder, and they spiral out of control so fast it is terrifying... You get to the point where you are out of control, you feel terrifed, you're in pain, you start lying to the people around you, pretending every day that you are fine when you feel the last thing from it, yet you don't know how to stop... it's scary, dangerous, and unbelievably addictive. It can take over your life in so many ways - emotionally, mentally, physically, relationships, job, finances, and so on. It's important to get help, and the earlier the better. Have you considered talking to someone like a counsellor or seeking support in that way? Or somewhere like Sheena's Place? It's in downtown Toronto, here is the webite: http://www.sheenasplace.org/
I wish you all the best and I dearly hope that you reach out for help around you (in addition to 3FC) to help you with what you are going through
Take good care of yourself!