Is the cut on my elbow infected?

6 days ago i fell on the sidewalk and scraped my elbow so badly i took off enough skin to see the white underneath. gross I know. when i got home i cleaned it up and bandaged it and now I'm using an anti-bacterial spray-on bandage. It started to scab around the edges and it doesn't hurt as much as it did before. The only thing is this yellow-ish pus keeps leaking from it, but not a lot. I've read online that it can be a sign of infection or that it's just normal. Any insight?