So the problem is every site looks like Reddit? Or is it that all the text is being smushed at the top of the screen.
Try checking another browser (firefox, safari, IE) to see if they have a similar problem. If they do, it's an issue with your PC. If not, it's an issue with Chrome. If the latter is true, reinstall chrome. If the problem persists after all that, switch browsers. If it's an issue with your PC, check the different display settings and such. If that fails to do anything, restore your computer to a previous date where you didn't have the issue.