First, you can change the content of a footer or header to reflect the current content of the page without changing the footer or header. You use a StyleRef Field to do this.

Second, if you really need to change your headers and footers, you can insert a next-page, an odd-page, or an even-page section break. You do not need to change the pagination to do this. Turn off the link to previous setting in the Header/Footer context tab.
Sections / Headers and Footers in Microsoft Word 2007-2010

Is this what you needed?