I just Beat The GMAT!

Hi All,
I just took GMAT today first time and scored a very bad 550 (51 percentile). Q40 and V26. I am an Indian IT female professional with around 7.5 years of experience. I was seriously preparing for it for last 1.5 months investing roughly 7 hours per week(used to study mostly during weekends and in bus on the way to office). In practice tests I used to get around 580-630. However, during last week I didn't take any practice test. I believe the main reason of my failure was I never took a complete test of 4 hours including AWA. Always used to skip AWA section. So had serious pacing issues in quantitative and verbal after AWA. I almost had to guess last 10-12 questions of verbal. Though I had a good start with verbal. Secondly, I exceeded my break time after AWA by 3.5 minutes because of which I lost complete confidence to break the GMAT. Somehow I paced through the quantitative section. So advice to all who are going to appear for GMAT that go back to your seats 2-3 minutes prior to your break end time. I didn't know that they will scan palm again during the breaks which took some time for me.
My appointment was at 14.45 pm today. My husband came with me to the test center. I was reading the flash cards in the tube during my journey to Holborn test center in London. Reached at around 14.25 pm to the test center. Read regulations and gave id proof so she signed me in. As soon as I reached inside the room I saw I was allocated terminal 13. Believing in numerology 13 number has never been a good number for me, I thought now its all going to be messed up. I had to select business schools for applications initially. Then proceeded to AWA section. Analysis of Argument was ok followed by quite simple Analysis of Issue. First time I wrote AWA in exam. Never practiced it before. Advice to practice AWA before exam as I was very tired typing AWA. Though dont have any typing issues but it really makes you exhausted.
Then I went for break had bananas and coffee. I had trouble finding my test room again which took an additional 2.5 -3 minutes. I got delayed for quantitative section and was very disappointed. Somehow I rushed through the section. Then took break. Started with verbal. This time I reached 2 minutes in advance. Started with it properly with SC. It was good. But after 20 questions I felt very exhausted. Came across RC which took lot of time and so I ran short of time. I literally had to rush through last 10-12 questions.
I have been using BTG forum and find it excellent. Thanks to the founder and you people who are extremely helpful in answering queries. Need an advice as to which schools accept 550 in London or India. Should I give up my dream of doing an MBA from a good B-school or should I pursue an executive MBA. I am very serious about getting an MBA from a good B-school. I have good GPA I believe because stood second in my engineering college (B.E computer engg) from mumbai university. I had good work experience in well known MNC's Infosys, Geometric software solutions. Have a good onsite exposure was working with ABN Amro(USA), Belgacom(Telecom company based in Belgium). I also won a spot award in Infosys. Currently I am working with a company in UK for past 1.5 years. This was just a briefing to give an idea about my profile and chances for securing admission in a good MBA school. My dream schools are ISB, LSB, Warwick, Cranfield or Cass. I am sure I wont get admission to any of these schools with this score. So need advice whether reappearing and securing 600 will help or should I look for some other option.
Please advice what should I do next?
Many Thanks in advance.