If you have a friendly shop that won't charge you, it might be good to have them look at it quickly and see if it is a settings problem. I would not pay for a service until you understand how your camera works so you can be sure for yourself it is just not a wrong setting. While your camera has some automatic modes, it is not a point and shoot and it has settings available to you that could be set wrong for a given situation.
As far a focus point being off to one side, I was referring to the possibility of you being in single point mode and unknowingly moving that point around the screen with the arrow button. You have 11 points and can choose any one in single point mode. Accidentally choosing a point off center can cause unexpected results. In fact, just not being familiar with your focus modes will cause unexpected results. If none of that makes sense, then you really should get familiar with those settings. They are basic 'everyday tools' that are available in your camera.
@pedroj mentioned camera shake and settings, that is a good possibility too. How are pictures in Auto mode? Auto mode will eliminate some possible bad settings, but focus mode might still be an issue. You could try resetting the shooting and setup options as described in your manual. Post some pictures if you want and we can take a look. If you post pictures, list ALL of your camera settings.