I think this score is good. A 20 point difference isn’t going to make or break your application, a 1500+ score is really good. If your summer is busy, personally I don’t think you need to retake it. The difference between 1530 and 1550 is like 2-3 questions. For reference, I got a 1550 (790M & 760 R), lost 10 points because of 1 math question.
The only way I see retaking it as useful is for the presidential scholars program. That just takes the SAT score when you are a senior(I’m assuming you’re a junior right now), and if it is one of the highest SAT scores in your state, you get chooses and I think there’s some good prize money. Even then, retake it later in the year when you are officially a senior.
More info: U.S. Presidential Scholars Program