Screen Has Slightly Warped Since Short Power Outage?

Yesterday, there was a short power outage which caused my computer to force shut down. When I turned it on, the screen resolution was off, so I managed to fix it by hardware (the auto button on my monitor) since software-based fixing didn't work (which has managed to solve this problem in the past, at least I think it was the same problem). Anyway, after I did this, the icons were strange; bigger than usual, not e.g. 128x128 but rather 140x128 (that isn't the exact size but they were higher than they were wide). This is quite annoying. The circular icons have become ovals and the square icons have become rectangular. By the way, the same thing has, I think, happened to the taskbar as well. It's harder to tell with things other than icons, but it's visible. So basically, everything is slightly higher than wider than it should be, not only the icons.