WordPress Layout Got Skewed

I recently installed a wordpress layout and skinned it. While updating a forum for the site, I must have accidentally done something wrong, because when I visited my blog the next time I saw that part of the layout that was originally on the right side of the page dropped to the bottom of the page. It’s probably an easy problem to fix if I knew what file I needed to alter.

This is the site here —-> https://www.thefluffyshrimp.com/

If you view the page source, you can see what moved was everything under <!– END CONTENT –> where the calander section is. All that stuff is supposed to be on the right side of the page, not at the bottom.

Can anyone help me fix it? Thank you so much in advance!