[Dimon Sharker]

Recently I've updated my Nokia lumia 625 to windows 8.1 and it was working smoothly in this device but few minutes ago it was not responding so I shut it down and open it again,this time it shut down itself and after few seconds it was back with a blue screen and in the middle of the screen there is a ' :( ' sign showing.
Then I restarted it and it was not working so I give it a soft reset but still showing the same thing. What should i do now?
Please don't tell me that I have to give ita heard reset :(