GMAT 550 with GMATPREP 660?!

just got back from the gmat and very unhappy with 550 after my gmat prep was 660. i was shooting for a 50%tile quant and had been in the 95%tile on verbal with the prep. ended up 35Q/31 V. my prep V's were 44-48! i am a surgeon planning on going to bschool at the age of 45. dont have a lot of time t...