Don't worry yourself too much about it, from what I've picked up around these forums a lot of people don't finish all the tests and don't feel they did great yet still get through. If you answered the bulk (say 75%) of each paper and did it accurately then you're probably still in with a good chance. I'm fairly sure I've read posts by people who didn't think they got more than 50% and still passed, so don't give up hope.