Advice for SAT II Math II?

Hello all. I’m having a heck of a hard time with the SAT Math II test. Although I’ve gotten an A in every math course I’ve taken so far (up to and including AP Calc BC, which I got a 5 on), I just can’t handle this test – I’m scoring in the high 600’s.

I don’t remember probability or matrices at all, my trig is slightly weak, and anything having to do with ellipses, and I’m making lots of stupid mistakes on what should be elementary math problems. I think the trouble is that I haven’t seen or done anything with a majority of the topics on the test in years, and have thus forgotten most of it. Does anyone have any advice or recommendations for prep resources?

https://www.amazon.com/Barrons-Subject-Test-Math-Level/dp/1438000316

or try level 1 instead.