I'm late to this thread, but I'll chime in as another sympathetic voice. It sucks to feel out of control of your body, and it sucks when favorite clothes are too tight. I've been struggling with this a bit myself, having gained 5lbs and gone up a size this winter (made harder by knowing that my lowest weight four years ago was too low - lots of sports plus depression, not intentional - so I shouldn't have that as a goal, but it's still in my head as the comparison point).
I've also been trying to get back in the habit of avoiding sugar, because I'm happier when I do. And walking a lot more - 3 miles today just to and from the subway and the climbing gym - instead of driving to work. I love walking so much.
I'm also making peace with buying clothes one size up, because I know I'll love how I look in them. It takes me a few months to acclimate but I know from past fluctuations that I'll get used to it, and I'd much much rather have clothes that fit and that I love. So buy yourself things that fit! And since looser fits are in, just belt them when you lose a few pounds!
(The hardest are the things that just don't *feel* the same about my body. My thighs are touching now - I realize this is entirely normal, but it just happens to be a new physical sensation to me.)