i've had 2 falls since i went clipless too... must be the magic number. First one was the first day, second one was a few weeks later.

Hang in there. I totally understand the fear... it was sooo hard to get back on the bike after falling, but you can do it .. you can do it... others have done it, you can do it too .

My policy now is always unclip the same foot (left works for me) and not to be embarassed about unclipping way way early for a stop, or even if i approach a situation where i might have to stop ( regularly unclip for what turns out to be no reason ) ... and i'm starting to feel much more comfortable. Hopefully there wont be any more falls....