Ouch!
there has to be an aspect of the math that is hurting you, you need to pin point it and focus on that/those. First time I took the SAT i got a 570 in my math, and since i had answer service, I got to see everything I got wrong and why, so I deduced that it was my analytical geometry that was hindering me, probably because I hadn't seen the subject matter in three years. I went to tutoring for that subject and took the SAT again and got a 650 in the math section