Finished Gmat with a score of 430 :-((

Hello,
I completed my GMAT today with a really bad score of 430.In the first attempt I got a score of 480 and verbal and analytical was ok..Analytical(5.5 and verbal (27)).So I decided that I need to retake, with a better score.
I got better improvement in the scores in the practice

Barron's (570)
Gmat Prep(530 Q31,V31) yesterday..

But all of a sudden today I landed up with a terrible score of 430 , to my shock.verbal(v18).I know I am capable of a better score, atleast in the beginning 500's...Having booked a gmat appt in just within 3 weeks,didnot help me either...One more thing, my first attempt, verbal score was 27 and in the second attempt , quans score was 32.However, I was not even able to bring the same score in one GMAT test.

Now I am totally devastated and dejected...any one..help pls..I read in the forum that Gmatprep was true indicator of the test score,how come in my case, there is a difference of -100 points...(((