I keep getting paranoid with my iphone?

I left my iphone on a table while I went to the bathroom and I come back and a couple of guys where pushing buttons on it and I'm paranoid that they hurt something on the phone like the screen not being as responsive. I don't think they touched the screen hard or dropped I'm just paranoid that they hurt it while I was gone please help?!

Keep it in your pocket, no reason to have it sitting out like that.

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