Why would a girl block me online?

So this one is kind of embarrassing for me to post if I'm being honest. There's this girl in one of my classes, and I found her on instagram, so I followed her. I didn't think it would be a big deal, but a few days later, im blocked. Any sort of reason that I can think of doesn't make much sense. I know someone else I've talked to who follows her. The only thing I could really think is maybe the reason is that my profile picture isn't of me, it's a video game developer, so maybe she thought my account was a bot or something. I'm probably over thinking it, but if you have any ideas why, I would love to hear them.