I am the same way. I'll put off going with the hopes that whatever the problem is, it will just go away. I don't want to hear that something is wrong. When I do finally go, I'm analyzing every facial expression and comment that the doctor makes. One comment or look of concern will send me into a tizzy of anxiety. Same goes for the dentist. I always end up rushing in on an emergency basis because I've put something off for too long. Why I do this to myself, I have no idea.
It's almost like I don't want to know that something is wrong yet it's okay to let my mind wander and create all sorts of scenarios of what I think is wrong. Can't win.