Help!!! I need some advice.

Hi MFP,
Weightloss is a really hard topic for me. All my life I was 120-23 pounds until I got put on BC. I got the implanon put into my arm and my life been sour since. I skyrocketed to 190 fairly quickly. maybe within 3-4 months. I think its because im so use to eating junk food and staying skinny. now im addicted to food. I own insanity, turbofire, turbojam, brazil butt lift, slim in 6, and 30ds. I tell myself constantly " you have to workout'' "you need to change your life" ..... I can never stick to anything im so lazy :(((((( And to make matters worse my whole family eats very unhealthy. im the biggest person in my house. and it hurts so much. i have self esteem problems, i just want my old life back. any tips? anything to help me please? maybe a support group? I'm 5'3 190-4 pounds and I'm 17.