I am rubbish at math but i needed to do it to get my access to higher education,it is hard but think if the rest seems easy just focus in the math and try to see if you can study past papers,i found them particularly usefull for knowing the type if questions i was facing,and actually a lot of the questions come up again year after year.But whatever you do ,dont throw in the towel,be stubborn and continue,you have come this far so you know you can do it.
Good luck and fill us in with your result if you want.