No risk here really. 10 seconds is not long enough and just the tip of the tongue is not worth worrying over at all
As Gazsmithster mention, this is not a risk for anything in the real world.
Going forward, you should know, though, that you can't "clean up" or wash off an STD. If you had had a risk, which you really didn't, showering and cleaning up would make no difference at all. You would just have a clean body, with the same risk for an STD as if you had not washed at all.