writing is like pulling teeth sometimes

When i was in high school I would write novellas. They were my version of a Sweet valley high type story. And the words would just pour out of me. I wouldn't have to think of where my story should go, it would just naturally flow from scene to scene. And nine times out of ten I would love what I wrote.
Now it seems the ideas come easily to me but the actual writing can be like pulling teeth sometimes. I think I am over thinking it. That is why I am trying to write the end of Come Back to Me without any any editing. I could get caught up in editing and re writing and never get anywhere in the story.