My cat got my heel. What do I do?

This is a photo of my heel. I was playing with my cat too close to my feet last night and he scratched me. I have a trade show coming up in Chicago on Monday and I will be doing the most walking of the year. Currently this hurts (a medium amount) when I wear boots or sneakers.

How can I treat this so it heals the quickest and also protect it throughout the week? Thank you!!!