Did you said a very small leak?? I say relax and go home. It will take months for a small leak like that to develop into anything that you should be concern about. Keep an eye on it at least once a week, once you get home call the dealer and take it in for them to look at it. They will order the necessary parts to get your truck back on the road. If you're concern about the seal blowing apart... relax it won't it's a slow painful leak. So relax and enjoy the ride home.