Remove White Gap on Right Side of Page on Desktop & Mobile

Site URL: https://putmeincoachhlp.com/

Hi- For some reason there is a small white gap on the right side of my webpage, on desktop, tablet & mobile layouts, and I can't figure out way. When you first visit the site it isn't noticeable, but when you scroll sideways it becomes visible. Any ideas on how to fix this? I've searched a couple other threads but haven't found a solution. 

I am not quite sure but it appears to me that it has something to do with the parallax effect. When I removed the entire site elements except the header, the header was automatically fixed. So some other element is taking this width. Probably the images in the parallax. 

Sometime summary block caused this. You can also check.