My iPhone 5 is acting as if I'm pressing the home button repeatedly

It keeps exiting out of my apps, turning on and off Siri over and over again, changing color- basically it's executing all the functions the home button does. Thing is, I'm not pressing the home button. I've tried googling the problem but haven't found any solutions. Help please? I'm unable to do anything on my phone currently.

Bring it to the apple store and explain your situation

My phone is doing this now. Havnt found out how to fix it yet.