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.
No risk here really. 10 seconds is not long enough and just the tip of the tongue is not worth worrying over at all