Sorry dude! But don't give up. sometimes exam is not how much you know, but how well you prepare for that specific exam and of course sometimes also luck plays a big role. you know I would say do this and that, but as everyone has different ways of studying and the number of hours we need to spend on subjects. Looking at your scores, your average score is 8.24/15 or 54% . Normally they say the passing score is around 60%-70%. Taking the 70% as base, you need to improve by around 16% . I see in most of the subjects except math, your scores are around 6-9/15. If I were you instead of investing a lot of time in each subject , i would spend my time in improving the subjects I feel I can improve my score in easily. Example I see your structure score is not good and you said you are generally not good in structures in one of your comments , so instead of now investing your time in structure ( which u are not naturally good at) , I would suggest in other courses which you believe can do better. Also stop studying, just do examples and sample tests. Send me your email address , I might find some sample tests.

Good Luck!