Am i normal for having an emotional reaction to this?

So at my uni there's this middle school aged girl who's going there. She and I are in the same study group and I said something along the lines of "I wish i got to go to college at your age" (just because I like the class structure more) and she replied with "there are a lot of pedophiles on campus so there's some trade offs."

I didn't like...freak out externally. Luckily I'm good at hiding my emotions. But I just felt sick. Like physically sick. Like i nearly wanted to go throw up in a bin sick.

I don't even know why specifically I felt like that. To be honest I don't know how much she was being sarcastic. I don't know if its that I feel like i can't trust people at my campus [I already know there are bad people here. No shit. So why would that cause it?], or if its because i felt bad for her for having to be afraid of that [she's pretty "mature" (for lack of a better term) so i don't know if that makes sense either] or...I don't know. I just wanted to tell someone because my therapy appointment got canceled and I just flet really, really bad.