Overciming compulsive eating

Hi all i am wondering if anyone has any suggestions in how to overcome compulsive eating. I have put on 20kg in a year. My skin and hair and breath are terrible. I have headaches all the time. I keep getting sick. My joints ache. All of my bones in my feet feel broken from the weight but i still keep overeating several times a day to the point of almost being physically ill.
I joined weight watchers but blowing my points by lunch every single day is esculating my behaviour. I dont know what to do and am considering a lap band. I am also thinking of getting rid if my WW membership and using the money for a membershio at a yoga studio so i can practice living myself. The one i know of locally also has weekly mindfulness and meditation workshops. I need to vreak this cycke i thought it was medication related but i got my IUD out 6 months ago and stopped SSRIs 2 months ago and its getting worse not better.
All this eating i do in secret either while my toddler naps and i drive around with him or on my way to and from work. I even tell my husband i am going to the gym and do it wearing my exercise clothes in random fast food carparks.