I think you need to have more confidence in yourself and remind yourself that YOU are in charge here!
We all started out where you are now- but the best thing I can tell you is to take baby steps and if you think you might be overwhelmed change one or two things at a time.
Do you track your calories? Using a site like sparkpeople.com might help you to see how much you need to eat and how much you are eating and that might help you stay in check with your eating. Drinking a lot of water also helps because sometimes thirst is mistaken for hunger.
3fc is the best place- if I hadn't come here I don't think I'd ever have gotten back down below 200 lbs again.
Good luck!