I don't know, but miracles must come in envelopes. All I did was listen in lessons and ask questions to understand the topic more, then revise that stuff prior to the exams! May you get a better result than me this time next year!
I got an offer from a uni asking AAB with my AS results being BCD, and I got accepted to that uni today! It's more than possible!
Wow, congrats on that Just out of interest, what were you predicted by your teachers? I'm in a similar situation with ABD at AS and I'm predicted ABB, just wondering whether I can apply to uni's asking for AAA.