Firstly, remove the word "cheat" from your diet. To cheat is to use illicit means to achieve your goals more quickly, which you can't be doing unless you're taking steroids.
So you indulged some corn and barbeque sauce. But you also ate plenty of good food - more than you've ever eaten in a single day before, I'm willing to bet - and you passed on a food that you knew was bad for you. Now ask yourself this: do you feel deprived because you didn't eat the cheesecake? Do you hear its dulcet tones calling to you from your fridge?
I'm guessing not. Eating a diet full of real foods will do that to you.
Anyway, I'm going to agree with Griff on this one: eat moar veggies. Get yer wifey to make you some salads (or make them yourself) and eat them regularly. Lettuce, chard, cucumbers, green peppers, celery, and radishes are all fairly low-carbohydrate but contain lots of veggie goodness. Buy yourself some awesome vinegar and olive oil (or Litehouse bleu cheese dressing) and make every salad an exciting adventure for your tastebuds.
Also, I would advise you to keep consumption of watermelon and other high-sugar fruits fairly low for the time being. If you're suffering from sweets cravings, get some frozen berries - either strawberries or a mix. Pour some (not a lot) into a bowl, add some cream and a little sweetener if you need it, and enjoy muchly.