I have to second Isaac and tl. While I have not done ww, it has far too many success stories (including all these here ) for it to be all bad.
You are seeing the results of your actions, in short if it's to working, you have to change something up, and ww seems to be a proven system that also seems to support the increase in exercise.
On top of that you have people,here with lots of experience on ww who are more than willing to help.
Give it two months of steady, accurate use then decide if it made a difference. I can't imagine the small expense of joining the program is not a qualified investment in your future.