A family of Microsoft word processing software products for creating web, email, and print documents.
Look at the settings for whatever style you are using for your "normal" text. Is there any Spacing Before specified for that style?
You should also verify that Vertical Alignment is set to "Top." Look on the Layout tab of the Page Setup dialog box. To display the dialog, click the dialog launcher button (the little arrow on the bottom right) of the Page Setup group on the Page Layout ribbon tab.