Nah - you're probably good. You probably don't want to fall again, so you'll probably think a bit harder before rolling to a stop. Until you get used to it, unclipping early is okay, as is loosening the tension on the pedal that you generally unclip from.

When I first went clipless, I was told that everybody falls at least once, and I was out to be the exception to the rule. I'd been riding a whole month without a fall when it happened - in the parking lot of an event, in front of several hundred "serious" cyclists.

Welcome to the club.