From my experience, common leaks on our cars are right after the primary catalytic converter. More than likely, it's only your gasket.
Go back out, and run the car. Find some old cardboard and place it under the culprit leak spot(s). Get back in and revv the engine, but not too high if it's cold still..
this should find your leak as black soot will cover a spot on your cardboard.

Unfortunately I can't supply my pics as I've locked my backup CDs into a fireproof box that is currently buried with stuff