My advice: Try the shortcut right now (on purpose). See how it feels. Then fix it. Knowing how to control your display orientation puts you in the 1% of users who don't have to call IT for a sideways screen.
Don’t panic. You’ve just discovered the . screen flip shortcut
We’ve all been there. You accidentally press a mysterious combination of keys, and suddenly your beautiful, widescreen monitor turns sideways. Your taskbar is now a vertical column on the left, and you have to tilt your head like a confused puppy to read this sentence. My advice: Try the shortcut right now (on purpose)