Majoring in elementary education but I have an extreme fear of school shootings?!

So I am an elementary education major. This is something I have wanted to do since I was young. I have always wanted to teach and I couldn’t imagine doing anything else.. the problem is I have an extreme fear of school shootings. I live in the US and it seems there are always shootings going on at large places with a lot of people (often times schools)

How can I get over this fear? I even have had nightmares about it. I don’t want it to stop me from doing something I have always wanted to do 😔 Is this something I will grow out of? I’m only 21. Anyone here who has the same fear and how do you handle it? Thanks