Sounds like you've accidentally turned off the Interpage display, which also turns off the headers and footers and the top and bottom margins. This is easily fixed, but first let's make sure you’re in Print Layout view.
In Word versions prior to Word 2007:
1. Click the View->Print Layout menu item.
In Word 2007:
1. Click on the View tab on the Ribbon.
2. Click the Print Layout button all the way on the left.
Now here’s how to fix the Interpage display itself.
1. Find the solid black line between the pages or at the top of the first page.
2. Click it with the cursor. (Double-click in Word 2007.)
That should bring things back the way you want them.
Hope that helps.
P.S. Even without doing any of the above, your file will appear normal in Print Preview and will print properly.