I understand that you are disappointed with your score and you feel cheated and lost, but you have to remember that this one score cant stop you from your future goals. What if some of our greatest leaders gave up in the sight of sudden failure? Would we have some of our greatest accomplishments? Thomas Edison failed more than a 1000 times before he invented some of his greatest inventions, maybe it takes you two or three times. Many people don't even have the opportunity to correct their mistakes or have to spend many years correcting them such as low undergraduate gpa.
At this point, I don't think you should reconsider your dreams and aspirations but may be some time to plan how your going to whoop the mcats butt would be more productive. It is unfortunate that you feel like you did not know what you were doing wrong, since that could be the first step into honing into correcting your past mistakes. However, taking the MCAT is quite common and you should not be ashamed of it. Most people find their light, second time around and with a new attitude and confidence, they really nail the test. Maybe this is you. Spend this week to grief and recuperate, but once you are done and you have accepted the fact that a re-take is in order... plan a new strategy that you think will work. Maybe you didnt do enough content or maybe there weren't enough practice tests.
Try browsing around SDN and look what others have done to improve their scores. Since I have no information about you, I cannot suggest much but I can reassure you ANYONE can improve on the MCAT.
*I also took the liberty to correct the spelling on your title, I hope that is ok.