This has sometimes happened with me, Daisy.
Go back to the main page and highlight all the text in the address bar at the top of the page. Right-click on it and COPY. Go into your Bookmarks and find your link. Right-click on it and go to PROPERTIES. If you're using Firefox there will be a LOCATION box with the http:\\ text in it. Highlight all of it and then right-click on it and press PASTE. click on OK and then quit your browser. Restart it and it should be fine.
Any other browsers and I wouldn't know if the above trick will work or not.