Check the oil level if not over full, Let it idle in the driveway and get good and hot. The water will boil off the oil and it should be okay. If in doubt, change it out. Over full means the oil is floating ontop of water in the bottom of pan. Drain it till the waters gone, best to drain it all and start with fresh oil. Dirty shaving cream like oil means the water and oil have been mixed in a blended (crankcase) and it should be drained overnight and flushed repeatedly.
Beer'll make it all better.