I fell down, scraped my knee, and it huuuuurtssss

Warning for it being a little icky to look at.

I tried washing it out with water, but it’s still dark. Is that normal? This is 9 hours later. It hurts so bad, arghhh. We’re going to put Neosporin on it, although I hesitate to do that with an open wound.. I know you guys aren’t doctors, but what do you do with something like this