So the last 5 downvotes I gave out were not warranted and given in a moment of Internet weakness. (I just have a pet peeve against people who ask a question then snarkily reply that the answer you took time to give 'makes their skin crawl'.) But in any case it was abuse, and I don't mind losing some rep, but I am unable to reverse what I did. (It says I can only change my vote if the answer has been edited). Is there a way to report abuse (it is pretty clear cut since I am admitting to it) and having a moderator take care of it?
Moderators can't change votes, although I suppose they could edit the posts in question to allow you to modify your vote yourself. Ultimately, it's probably not worth the effort. So long as you learn your lesson and consider your downvotes more carefully in the future, it's all good.
That said, I think downvoting a question or answer that you think is worded aggressively is not necessarily a bad thing. "Be nice" is one of the guidelines clearly states in the FAQ. If someone can't be bothered to be nice to those helping them, do they deserve the upvotes?