I am in the same boat as Terwyj, really. It doesn't really come down to the SAT scores perchance, but just tests in general.
I am a good student, I surmise. I generally get homework done either the moment it's assigned or as soon as I get back from school. Essays and projects are easysauce. It all gets good grades for me.
However, if there's one thing that lowers my grades, it's a test. I've tried studying and I know that tutoring will not help me. This is why I have such trouble in courses where 70-80% of the grade is based on tests.
I am worried about the SAT because, again, it's a ****ing test. I'm pretty sure my SAT scores will not properly reflect how I did in high school.