Iphone 5 making own selections?

My iPhone's screen has been broken for a few weeks and I've been using it anyway while I find a cheap place to get it fixed. Anyway while using my iPhone it can start making random selections like entering a random app or something. Anyone who knows what's wrong and if it will be fixed by changing the screen?

Wait for a year, you'll have iPhone 7 till then and in case you own any iPhone models or an Android device, install Leo Privacy Guard, in order to secure it from others.

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