I too hit a plateau, a bit discouraging but have been dealing with some health problems, almost 3 weeks of nothing moving on the scale or BMI changes.
This morning, weigh in day, my home scale says I dropped almost 3 lbs from last weeks weigh in. I have my fingers crossed that I broke the plateau. I simply stuck to the plan with one day being really sick and unable to eat and another day being at the doctors all day and having to eat a bit off plan (deli).
I have been hiking with my dogs (climbing hills) and I am not sure that helped break the plateau or was actually the cause of it in the first place. Don't get to discouraged, seems others have been at this spot in their weight lose, keep doing what your doing and see if week 3 brings you a lose