You get 5 reputation points from an upvote of your question and 10 points from that of your answer.
You lose 2 reputation points when your questions or answers are downvoted. The best way seems to be either edit another (not your own) post to get two points or flag the following question for moderator's attention and ask a moderator to delete your question.
One of your questions has 9 downvotes. You will recover 18 reputation points when this question is deleted.
For further information, please read How does “Reputation” work?
As @DanBron commented, if you post a question or answer that could attract so many downvotes again, the system might block you from posting anything. You had better be careful when you ask and answer.
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