My iphone camera taking pictures by itself! - 1

I have an iPhone 5 and i opened up the camera to take some selfies (please don't judge! I have this new editing app i wanted to try… ) and i took a few then my camera spazzed out or something and took picture after picture, but the really creepy part is when i turned it away from my face it stopped! Then i hit the home button and and volume turned itself down! Then i opened the camera and aimed it at something random and after a little while, it took one picture. Then after hitting the home button, the volume turned itself UP!
okay! A little background, I USED to go on Omegle and then talk to those people on kik (i know, stupid, STUPID thing to do, that's why i stopped and deleted kik) but is it possible for someone to have hacked my phone through that or something? I also have an instagram, was this a hack? Cuz i'm Really freaking out right now!

I don't judge. I'm not a lawyer.

Your problem is rooted in the fact that you are taking pictures with a phone. To make matters worse, you install apps that you don't really know about which can cause the phone to act stupidly. Yes, if you don't understand the right order of things in this universe, the correct response is to freak out.

What to do? Uninstall the last app. Test the camera. Continue uninstalling up to the point where you phone is like when you just got it out of the box. IF the phone continues to act up despite being basically devoid of your customizations, bring it back to Apple and have them sort it out. Nothing else you can do.