Everyone who’s ever edited a document: oh there’s now a blank page at the end of this Word document, time to get rid of that!
Word: no
Everyone: please delete
Word: shan’t
Everyone: * frantically presses delete backspace delete*
Word: answer me these riddles three
In case you’re in this situation in future, you can use section breaks before and after the page and give the middle section a different header/footer. It’s still not great because you can’t (to my knowledge) tie the section before to the section after so now you have to change both the first and third sections any time you want to adjust the main header/footer.