Yup, we’re the same way. My SO keeps worrying, “what if X happens? What if Y happens?” and they don’t seem to like my answer of, “we’ll cross that bridge when we get to it.” We’re quite stable financially, so we’re prepared to handle pretty much any surprise, yet she still worries about random things.
I think some people are just predisposed to anxiety. I’m glad I don’t have to deal with that.