It might be partially a function of rebound depression, it might be a reaction to stopping all the meds -- did you do that cold turkey, by the way? If so, it might be withdrawal from them -- and it could indeed be an ED starting up. There are a few pieces of advice I'll offer up, all with the same sort of theme to them: get yourself into treatment with a professional.

First of all, if you've cut way back on eating, or if you're fasting, then you're not doing yourself any favors. You're going to put your body into a state of starvation, which will make it much more eager to store fuel reserves -- read: fat -- whenever it can. Your metabolism will fall, making it harder to lose weight. And, of course, the malnutrition won't do you any good, either.

First things first, I'd get an evaluation about how far your ED has gone already. Then I'd get a physical evaluation, because you can do a lot more damage than you think in a lot less time than you'd imagine. (And it's lasting damage: I'm more than an inch shorter thanks to bone loss from AN.) For treatment, first is a therapist, of course, but the best advice I can give you is to get in to see a registered dietitian for nutritional counseling. Yeah, I know -- I swore up and down it was a waste of time, because I knew pretty much as much as there was to know about what to eat, even if I didn't eat it. But you know what? Turns out that this is the best thing I could have done. I learn something new at every appointment, and it does help calm me about how much and what I eat.

When we're in the midst of an ED, our perceptions of ourselves aren't very accurate. That's why it's best to listen to those around us. If "everyone" tells you that you shouldn't lose more weight right now, they probably see that more accurately than you do. Why do you feel fat? You don't. Fat isn't an emotion. What emotion are you feeling, when you think you feel fat? Why do you weigh so much? Well, how tall are you? How muscular? How active? All those things count, you know. Hell, your bones might be solid enough that they bring your ideal weight up to 165 or even more. (And if they are, you are blessed! I'm not old enough to have my bones, but I have them, and there's not much I can do about it now.)

Pack up your scale, or control that urge to obsess about it. Weigh yourself once a week. (OK, I know that's close to impossible. I weigh myself once a day -- but I make sure I keep it down to once a day.) Make an appointment to see a good doctor with experience with EDs. Get help now, don't wait until you're as miserable and screwed up as I am, 'K?

Good luck to you, and keep us updated -- there's good support to be had here.