I accidently trashed the layout

OK, I hadn't updated anything here in a long time. I wanted to update the link to my family tree, in the list of links along the right side. I found that Google had taken over the site since the last time I edited anything, and after about 15 minutes found the html code that contained the link addresses. I changed the address, saved the changes, and POOF, the layout of the page is totally different and the sidebar with the links is gone (which was important for me, because I used them daily to navigate to my favorite sites.). Now I'm frustrated and ticked off. Even if I figure out how to put the sidebar back on, I may have to reenter all the content.