If you don't have a lot of formatting such as italics and bold fonts, that should be your first choice... it will save much time.
But if you have a lot of formatting you want to preserve, you may be able to use a less drastic method.
The first thing to try is to simply return all formatting to "Normal".
Apply Normal Style to Entire MS Word Doc File
To do that, "select" or "highlight" your entire file with CTRL-A, then do a CTRLSHIFT-S to display your Styles List, choose Normal from the list, and click the "Reapply" button.
If you try this little trick early in this process... before you've made changes that make Normal lose its place, it may even leave your bold and italics intact... saving you a lot of time.
Mark Coker's The Nuclear OptionYou can take your file all the way back to plain text by copying it out to Notepad, then back into a clean MS Word page.
(This is the same thing Mark Coker calls the "Nuclear" approach. He is more comfortable with it than I am... I prefer trying a less drastic method first.)
MS Word's Clear Formatting
Clean up an MS Word 2003 doc file With Clear Formatting.
To see if it will work this way so I don’t have to go through the steps of putting all the photos back in.