Sepi, relax.. It can be pretty frustrating to end up with a score lower than that of the previous attempt. But it could be that you had a bad day. Ithink you should try once more as you have room to improve. Did you read all the explainations (especially for SC) in OG. I thought they are great. Also could you please let me know as what % of the questions in OG did you get wrong. May be you can compare it to that of those high scoring guys.
All the best
Scott