I get intense stomach pain at times and it leads me to watching what I eat like a hawk, but I can never figure out everything that could possibly cause it. So this makes me wonder if I'm just imagining it or not. I know it's there, but maybe it's anxiety-induced. This is just one example of health-related concerns I've ever had obsessive-excessive worrying over.
It doesn't bother me, but I know most people don't think about all of this as much as I do. At some doctor visits they just brush it off like I am imagining things, or that I shouldn't worry. It doesn't stop my thoughts though.