Are my SAT scores good enough?

CR: 700
Math: 690 (ouch…thought I did better)
Writing: 660 (not quite sure what happened here, language is usually my strong point.)
Essay: 8/12

Composite: 2050

I’m looking at Vanderbilt and Northwestern and realize that this score is definitely on the low end. Is it possible to take my score 100-200 points in two weeks when I take the November SAT?
If so, do you have any tips for preparation? I feel alright in the sense that I got above a 2000, which was my goal, but I’m still disappointed that it’s so low. Any advice? Thanks!!