Blood in hair/clothes??

Okay so I’m at rehearsal for this show I’m in, this kid cut his hand and it was bleeding. He didn’t go wash his hands because we didn’t have time to stop. and like blotted it with a paper towel and there was dry blood on his hands. I feel someone play with my hair and like touch my shoulder and it was him. I’m kind of scared now, I don’t have any cuts or anything. But if I touch my hair or clothes where he did then go to the bathroom or something can I catch anything?? Should I wash my hair ASAP? Help!