Anyone else prohibited from exercising for what seems like an eternity?

Hi-- Has anyone else out there had a medical condition that forced them to forgo any kind of exercise for a prolonged period of time? I was really getting back into swimming when I had a bad side-effect from the birth control pills my OB put me on in the Spring. I was hospitalized with a pulmonary embolism 2 1/2 weeks ago. Now I'm on blood thinners and they're trying to stabilize my levels so I'm told I shouldn't exercise at all until that's done. It's about to drive me insane. I haven't stopped exercising for over a few days since before high-school (25 years ago). I'm so tempted to just get in the water and swim easy but don't want to do anything stupid. Guess I just wondered if there are any others out there who survived an exercise lay-off and the resulting decrease in conditioning (and increase in crankiness). :)