Is it normal that i feel like this

Well, about a month and a half ago I hurt my friend by accident, fooling around. No physical injury. She was mad for a few days ,understandable. Since then I've asked her how she's been.(a few times) She said she's ok and were cool. But now an then I still worry. I wonder is there something that she didn't tell me or could there be an injury? She seems absolutely fine and hasn't complained of anything but my mind runs in circles and i get anxious. Am I over worrying or worrying about nothing? I feel horrible about it but don't want it to define me. IIN?