Hi Danielle,
I love your name, by the way.
I was the same way in my anatomy classes for massage school. Not with writing but with the tests. If I didn't get 100 then I had let myself down but my classmates wowed me and complimented me for the grades I did recieve.

It turns out when I did get 100, I felt embarrassed like somehow I didn't deserve it or it was "nothing".
It may be you don't think you're worthy of the summit. So, you keep making it to high to obtain, only to find that when you do reach it-somehow it's still not good enough.

I don't know the advice on this except to realize that it's what you're doing and then ask yourself, why?
Hope that helps a little.
(((((Danielle)))))))