I was playing a violent card game that involves slapping, and someone started bleeding from a cut. I am not sure if I was the one who cut them or how many cards I touched that had their blood on it. I didn't notice any visible blood on my hand, though, and I washed them multiple times. The next day, I had to handle my own new cut to wash it (new, not present at card game). What if their blood was still on my hands? Can I get HIV or Hepatitis C from this?