This, i'm afraid, is a question based on paranoia and misinformation.
You did not recieve hiv from this episode.
Your foot in a sink is not a route of transmission.
If the virus was in the sink (which is extremely unlikely) it would be dead
even if the virus was alive (which it wasn't), it has no way to enter your bloodstream unless it was on a space hopper - the virus simply can't jump from place to place
even if it could jump from place to place, there isn't a way for it to enter your foot unless there was a fresh, open wound.
Now stop worrying.