Help please!

<p>Hey guys, it would be awesome if you guys could help me out! Sorry its kind of long and has a lot of parts to it. I wasn't sure where to ask this so I just came here since it seemed a bit relevant.
So I'm a Junior who took the SAT I last December and I didn't do very well (not studying might have been why) so I got
Reading: 680
Math: 650
Writing: 610 (essay 10)
= 1940
I think I can easily break 2000 by studying up on my grammar so I was planning on retaking it sometime soon but the nearest one is in March and I wasn't sure if I can do well by then. But the next dates afterwards are in May and June and I have 4 AP tests at May to study for.
So my question is basically should I take the SAT's this March by cramming for two weeks or should I take it later? </p>

<p>Sorry, also if I'm planning on trying to go to Boston College or Boston University should I take the SAT II? If so then can you please recommend me when I should do it by?
Sorry again and thank you for reading/maybe answering! :D</p>