Am I Just Worrying Too Much?

Well if it's been there for a few years with consistency and hasn't changed, and doesn't seem to be causing any problems and no new health problems have been noticed since it appeared, it most likely isn't anything to worry about. However, if you started noticing other symptoms around the time it appeared it may be attributed to something else that isn't eye/bone related. But you should still get it checked out to see what it may be.