I got clobbered in New Orleans by a wet street car track that I didn't expect. I had ridden on the street many many times without problems, the tracks were fairly flush with the road surface, but that night I found out that the city periodically washed the street, tracks and all, with soapy water. Never seen that anywhere else. The bike just flew out laterally from under me. I'd crossed those tracks when they were wet before, but this was a whole new level of slippery. I was lucky to be able to get back on the bike and ride home. Could have been a lot worse.
You'll probably ride a bit slower at first, but very rapidly regain your confidence. But you learned wet metal is bad.