My wife had it... her case was pretty severe. I don't recall exactly how long she didn't feel like riding, though she doesn't have nearly the drive to ride as many here do. Best I can offer is listen to your doc and, more importantly, to your body, and ride when you feel up to it. Start with rides that won't be jarring the wrists - paved or smooth dirt paths before you start plunging into rock gardens and stuff.
Are you having open release or the orthoscopic one?