FallenGrace, I've been struggling with a similar thing recently, and I've realised that I'd much rather be strong & agile than fat & unfit, in case the same thing happens to me again. Switching using fat as protection, to strength as protection must be better
Have you thought about seeing a personal trainer, or starting martial arts? I'm going to do both when I've saved up some money, and the thought of it is very empowering.
*hugs* and I hope to see you around the forum more, it's great for support in whatever you're going through, be it the physical or mental part of weight loss.