Iphone 7 won't let me open apps, turn off the phone, or hard reset it?

I was on my phone looking at social media for a bit. Later, I unlocked my phone, tried to open messages and it wasn't working. I tried clicking all the other apps and none of them will open. I can't scroll through my apps. I CAN pull down the notification bar and the control center. I can turn on my flashlight but I can't open camera, alarm, or calculator. I can put the phone to sleep and wake it up, but I can't turn off the phone or hard reset it. I also can't get it to trust my computer when I plug it into it. Can anyone help? (I have iOS 11)

Iphone 5s

I would contact Apple Support about that.

My phone just did this. Hold the power button and the volume down button down until you see the Apple logo white screen. After that, your phone should be reset.

Thank you @camran

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