Iphone button is self pressing?

I have an iphone5 and the home button is pressing it's self… It goes to the home page when I try to do things, it goes to the shutdown apps page, and the worst is it goes to the voice control because I turned siri off and when it does that if I don't see it it calls, facetimes and turns on my music. What are my options my phone is 1 1/2 years old so it's out if warenty but not up for new contract?

Try doing hard reset, look that up lol. Its glitching and the only thing to do is go to the apple store multiple times and hope they fix it. Don't be discouraged if they pull the "well i don't know what to do, come back in two weeks if you keep having problems." I had to go there 5 times for my laptop because they didn't know what was wrong with it, so they replaced all of the internal parts and its currently not crashing every 5 minutes, i'm happy. Be consistent. You may get someone who won't make you pay.