My lenovo laptop screen is stretched and i don't know how i did it and how to fix it

Ok so i was playing the sims 3 and my game crashed, then my screen went upside down and i thought what everyone would think. Just restart it. So that is what i do, i load it up again, but this time its stretched, the max resolution is 1024 x 768 and that is what i'm on, there's no option to make it any bigger. Any help?

Your video driver was not loaded again after the crash and restart. You are now using the default Windows low res video driver. Without a Lenovo model number and which Windows version, only suggestion is go to support site and load and install the correct video driver again, restart.