Worried about quality of LSAT Writing

After sitting for the October LSAT, I took the LSAT writing portion the following day. Upon re-reading it after its recent approval, I am worried that because I made some grammatical and phrasing mistakes, it will impact how schools view my application. I am registered for Nov. 25, but want to send my apps off as soon as possible. If I do retake, is it worth postponing my apps for roughly one week to have a better piece of writing sent to the schools? Does it replace the current one on file? Any advice would be greatly appreciated.