Health paranoia

So I constantly freak myself out with health stuff. I’m a naturally paranoid person. Anyways here lately I find myself unable to sleep and paranoid, for some context I’m heavily aware of breast cancer. The problem is it’s gotten to the point where I’m constantly checking and staying up all night worrying about it. As far as I know it doesn’t run in my family but I also realize I’m not entirely sure what to look out for.