How to Make Sidebar longer?

I’m wondering if there’s any way to make my sidebar longer/the length of my content instead of the length of widgets. I basically cannot add in anymore widgets in my right side bar because it looks like it won’t fit, it gets distorted and moves to the left and isn’t properly positioned. Anyone know how to fix this?

My site is: http://www.amymacedo.com & my theme is ‘Pure & Simple’ if that helps

thanks!