Relax its good to be a little nervous it shows you really care for the results and that makes me believe you've given your best.
Giving your best shot, despite what you may think about the revision time you spent, is what counts and usually you'll find a pleasant surprise in store for you soon.
I hope and pray you've done yourself justice, either way just taking them and posting here shows your obvious sincere and serious attitude towards what you really care about, and that speaks volumes of a young man today with the right priorities and no matter what marks you get, you should be proud to have your attitude.
I for one will be hoping you get the good results you hope for and deserve too, my friend, I wish you all the very best
*** edit, that goes for everyone going through this too, exactly the same feelings for you all