I am very young and inexperienced man to advice you. But your post made my figures to type what is coming in mind. First of all you should go for rest of the papers.
If you are not going stay calm.
CSS is just a game some win and many lose. It is like world cup 12 teams participate and 11 lose the game. Same is the scene. Don't push yourself down. You might have got more knowledge than your peers. If you are not going for CSS go for outing and forget CSS. When I purchased all books of CSS I came yo satisfaction that if I fail it will not matter because at least I will be rich with knowledge. The valuable thing is knowledge not CSS . I know charms etc of CSS jb lal bati lagti h gari pe uska to nasha h surf but I would like to know where early people bureaucratic ? nops they were possessing knowledge so just calm down and forget CSS . CSS e nh h is duniya main sirf.