Hi SarahB
Have to say, you're definitely not alone. I'm in the same boat... only my plateau has lasted the last 5 months, more or less - and that's with me trying all sorts of things, and exercising regularly. In the year since I was first diagnosed I went from 207 lbs to 157 lbs pretty quickly (first 6 months) - and since then I've gone as low as 148 lbs (self-set target is 140 lbs) but seem to average 153 lbs no matter what I do. Seems like my body just doesn't want to go beyond this. :cry:
For now, I'm continuing on... watching what I eat, trying to keep up the exercise and working to smaller targets on a monthly basis. Like you, I must admit, I do lose the plot every now and then and that's when all the good work comes undone - it doesn't take more than a couple of days of no exercise and higher calorie/carb intake for my weight to shoot up again.
Probably not much help, I know, but you have my symps and hope you find a way soon.