So, my SAT is more or less in 5 days (first attempt). And I really want a good score on my first try. I’ve been doing papers and working on my weak points. (But it feels like I know nothing). what do you think would be the best way to utilize these last five days.

It sounds like you’re making the right moves. There is nothing I can think of that would serve you better than working specifically on your known weaknesses. Try to prioritize them based on how often they appear. For example, it’s more important to be an expert with functions than it is to be an expert with absolute value inequalities.