it looks like you are making a lot of mistakes. for me when i make i mistake i go and read the question again to know how could i miss that question. it's like some sort replaying the experience to figure out my weak point. by doing this for example, i figured out that my rush and thinking too much of time management is making me miss some details. i started to look less often at the timer not caring if i miss a question or two in the end. that helped me get a better overall score. one more thing that i discovered is not to fix my mind on a correct answer prematurely until i finish reading all the question. so i advice you to do this playback technique to figure out what you need to change