It's probably fine, once you take care of the leak. If it was the oil filter gasket, then the engine still had enough oil for 2 miles of travel. But if it was leaking from the drain plug, then it might have been completely dry, which could cause trouble much more quickly.

If you'd rather just avoid all of the stress, then get a new filter and drain plug washer installed, and refill the oil.

Then do a very unAmerican thing, and forget about it.

Cheers