How concerned should I be about this small wound?

I hate to even call it a wound. My daughter’s cat thought he was falling off the back of a chair and tried to catch himself with my arm. I have two tiny pinpricks where his claws got me. There was a hard knot under the pinpricks earlier but not as much now. Its very hot to the touch. The surrounding skin is bright red and very hot to the touch. It started about the size of a quarter and has doubled in size. Its obviously got a little infection but my question is should I seek medical attention tonight or wait and see if its better tomorrow? Waiting seems like the smartest thing to do, but I googled necrotizing faciitis and now I’m freaked out!