I accidentally dropped my phone and when I picked it up, it showed this on my screen. It still works. I really need a...

Go to a car mechanic

You could try force restarting your phone. Press and Hold down the Sleep / Power button along with the Volume Down button together for about 5 seconds. Or just hold down the Power button. Your device will vibrate and the restart process will start. Now leave both the buttons when you the Xiaomi boot screen.