Right sidebar issue

Suddenly the right sidebar on my blog moved under the content and I can’t bringt it back. Or probably just the content moved down? Anyway, all the settings say those widgets should be on the right side. The only thing I did before that happend is changing the title of a menu.

I already tried moving most of the widgets from the right side to the bottom and the remaining ones still stayed beneath the content.

I’m using the Customizr Child theme.

Any ideas?
Thanks in advance.