iPhone 4s Battery draining in two hours, heating up, and camera doesnt work.. HELP

My iPhone 4s gets really hot on the top right corner while its charging, the battery gets drained in less than two hours (not even using it) and the camera wont turn on... not in any app that uses the camera. I tried a factory reset! HELP. I dont know what to do, and my warranty is over! this is ridiculous and i need help.