I fell and scraped my knee pretty bad, I've been putting Neosporin on it becuase when it's dry it hurts to bend my knee. I noticed that is have some yellowish nasty on it & wonder if it's infected or just healing normal. The yellow stuff looks think, could it be pus? I cleaned it with peroxide the first day and the second day witch hazel I am now on day 3. It's starting to scab around the edges of the scrape