1997 Honda Civic 1997 Honda Civic gas leak. Should I be wor

I was about to go out when I smelled gas as I was about to enter my car. I looked under and sure enough gas was leaking under the tank. It had created a small puddle maybe 8-10 inches diameter. I looked at the tank and there was a couple of wet spots but I couldn't really tell where the leak was coming from. I opened the gas cap to take a peek and closed it back. I didn't use the car and return 3 hours later and find that the puddle is gone and the leak has stopped. The wet spots at the tank were still there but maybe they havent dried yet?

A little background - Last time I used the car was about 40 hours before I found the leak and I did fill up at a gas station and overfilled it as I went past the "click' sound to fully fill the car. I'm not sure if it has anything to do with it.

What likely happened here? Should I be worried if the leak has indeed stopped?