Anon, please don't do anything stupid. Think about yourself and the effect killing yourself will have on your family and friends. As many have pointed out already, A level results are not the be all and end all. I know plenty of people who worked really hard throughout year 12 and didn't come out with the grades they wanted/probably deserved. Sure, they felt down but they soon realised that something could be done about it. Most of them took re-sits in January and June and they all came out with good grades. I think the transition from GCSE to A levels is really hard and it often takes time to figure out what the examiners are looking for. It's as much about technique as it is about intelligence. You should definitely talk to your teachers about this. They would be more than happy to help. You've certainly got the motivation to do well - I mean, you've worked really hard all year. Some people don't have that sort of drive. You'll be fine. Many people are in the same situation as you but there is a way forward.