I engaged in physical activity with a man. Although we didn't have sex, he fingered me. My clitoris is now pretty swollen (like a little round ball) and sensitive. Is this normal?

It happens. That's a very sensitive part of the body. Sounds like he was a bit too rough.

Is it normal for there to be redness too? I feel like something could have torn around there. I don't know what, but it's like a round ball and redness around it. I'm sure its from being fingered though because I noticed it right after

Of course the redness is normal, that area has been irritated. Also make sure next time, his hands and fingernails are clean. No playing around until everything settles down.