To see what happened to me, go to Annus Mirabilis, a blog entry on what happens when a 47 year old father has "his" body feminise underneath "him".
It's probably not the only such story on the net: but it's probably the only one that's factual. The other cases we know about, such as Kathy Noble's, took years, not weeks/months.
Ah Me. Here I am, March 2007, and in March 2005 I'd never heard if "Intersex" (even though I'd been guardedly diagnosed with Androgen Insensitivity). Transition - from a middle aged "guy" with "undervirilised fertile male syndrome" and the body of an ex-rugby player into some kind of barrel-chested, thickset, bullnecked "man in a dress" - No Thanks, I'd pass. Or rather, I wouldn't "Pass", I'd be "Clocked", seen as a freak rather than a normal woman.
Then something happened (cue scene from "2010") "Something... wonderful.". Not inexplicable, but it requires 2 different Intersex conditions and has to be triggered by a particular statin (anti-cholesterol drug). We think.