Change WordPress URL to restore links

Hello – I recently changed my site domain and, following erroneous instructions from Go Daddy support, I changed the following:

WordPress URL: from example.com/blog to example2.com
Site URL: from example.com to example2.com

Now my image links in older blog posts are broken. The urls for the images are: http://example.com/blog/wp-content/uploads/2012/06/cycling.jpg

I think I need to change the WordPress URL to example2.com/blog but I am concerned about creating a redirect or force re-writing the existing links to something like http://example.com/BLOG/blog/wp-content/uploads/2012/06/cycling.jpg

Could someone please advise me on the best way to handle this? I’ve been sent in several different directions but nothing I’ve read seems to address this exact situation.

Thanks!