About half-way through an event yesterday I started having problems with the focus on my camera. The only point that will light up is the one on the far left. No matter what I try to focus on, my camera will only focus on what that point is on top of. This is making it very difficult to shoot pictures. I don't know if I accidentally switched something in my settings and seeing as it's a weekend, I can't call customer support for help and I need to shoot some more pictures for a project today. If anyone has any advice or has had this problem and knows what to do I would greatly appreciate any help. I made sure there was no dust on either side of my lens, the filter, or in the body several times.