Hey there -
We have a WONDERFUL "stickied" thread in our Weight Loss Support forum about scale fluctuations. Bottom line? They happen! For all kinds of reasons, including those you'd expect (extra sodium, hormonal issues) and those you might not (extra exercise).
You might want to check out our "Calorie Counters" forum, or the "20-somethings" or "30-somethings" (wherever you are most comfortable...no one checks ID!).
Can't wait to get to know you better!