Try not to worry about it as you can't change it now and it will only make your life miserable. Also remember, a lot of unis accept people anyway when they don't meet the requirements of their offer. When I applied yo University of Edinburgh to study English Lit. the offer was for AAA; I got AAB and was still accepted. Also a lot of my friends didn't meet their offers and still got into their chosen uni regardless. Remember, there is also clearing. Good luck.