Sidebar Is Under Posts in Chrome and IE

I’m not sure exactly what has happened…or when it happened, but sometime after I created a new menu (a footer menu and another header menu), my sidebar gets bumped under the posts when you view it in Chrome, or IE. It looks great in Firefox ??

Looks like this:
https://sevenfarmgirlsisters.com/wp-content/uploads/2015/03/Blog.jpg

I’ve looked for extra <div> tags, I’ve deactivated and reactivated all of my plugins, I’ve read and read and read and can’t figure out what I did wrong ?? ??

I have a Child Theme of 2012 that I’ve been working on. I installed the Parent 2012 and the sidebar is where it’s supposed to be. When I installed my Child 2012, it went back to being messed up, so clearly it’s something I did ??

Maybe it has nothing to do with the menus, I don’t know, but that’s about the same time I started noticing that.

Thank you for any help!

The site I’m working on is https://cathyflorence.com