Don't worry about the universities, just make a firm choice of best university you want to go to and then insurance of BBB. Don't stress over this because you won't do well with it. I got 6 As, 6 Vs and 1C in Gcse. I didn't do much in Gcse so these are pretty bad but in As I got AABB and in a2 I got A*A*A* in maths, CHEMISTRY AND BUSINESS studies this summer. I would say just focus and spend everyday revising. Go through content but use specification so you cover everything. It is important as I'm guessing you will be doing new a level too. Don't rely on what teacher say, they could forget some stuff. Also, do a lot of past papers. This is very simple help but if you do any of the subject I have done, dont hesitate to ask me. Good luck.. believe in your self. It is not impossible