I don't think my math score improved...?

Hello, I want your help. I took the SAT for the 2nd time yesterday, the make-up session for the January 23rd SAT. My plan was to focus on improving my math score, for I got a 2130 the first time (710 CR, 620 M, 800 W). I did a lot of practice questions and tests and felt pretty confident going into it, getting a 720 on one of the practice tests I took. But after coming out of the test yesterday and talking to my friend about what she thought, I’m confident that I got a lot of questions wrong, which is especially alarming because the curve is always so harsh. I feel like my score either stayed the same or went down… I don’t know why this section is so difficult for me, for I’ve gotten high A’s in all of my math courses. Can any of you offer some tips? I know that I don’t have another chance to improve on the old SAT, but does anyone have some suggestions for majorly improving for the new one? Clearly what I was doing didn’t work.

Anyone??