Don't worry sunnyboy your day will come .... like your nickname suggests, the Sun will rise in your world too.
Hang in there and this phase will pass. I know it is easier said than done.
Do let us know your experience while taking the GMAT and what you felt about it and the whole thing in general. What is your background. Maybe the experts in this forum can help you figure out a strategy to do better if you plan to take it again.
As of now, just try to relax for some time and get the bad score out of your system. Remember, THIS IS NOT THE END OF THE WORLD!