What do I do about my car leaking fuel.

I don't know anything about cars but I unfortunately drive a 2006 Chrysler 300. I was driving down the road and noticed a very faint gasoline smell. Made it to the house looked under and noticed some dripping. I smelled it and it was definitely gasoline. However, I moved my car off of the incline in my driveway and it stopped and hasn't leaked since (been about 45 mins). Is this definitely a serious fuel leak even though it stopped? I am not trying to burn down going down the road. Also, I just filled my tank.