help I open camera apps and it reboot

Here's the story wednesday afternoon I tried to install some apps and transfer pictures from iphone to pc and at night I played games on it. I forgot to shut off my iphone 3G overnight. On thursday afternoon it started to act weird the home button takes to long to respond then I decided to reset the phone after reboot my home button won't respond anymore. So I reset it (hold the power and home button) again and it work. I tried to restore it and jailbreak but nothing happened. It still the same home button is not responding and when I try to open the camera apps instead the camera apps will appear logo apple appear and it reboot.
Pls. help! I'm freaking out...plssss

 

pls help

 

yes... Ok i will try to un-JB it