Writing is Rewriting

Manged to revise some of the pages I wrote.  I need to pull out the beat sheet so that I adhere to any new scenes.  Been worried that I'm overwriting.   Also I am having an issue with trying to say what type of body language to describe the characters with.  Getting a little fruestrated, but this is the first draft.  I reccomend more work on top of work.  Writing is rewriting.