How to raise score at least 100 points in two weeks??

Hi I’m a junior that’s taking the October SAT and I’ve been prepping so much for the last three months but my score isn’t changing from a 1900. Finally on the last practice test I took yesterday my score rose 50 points to a 1950 but I’m still worried I won’t make my goal of a 2100. I go to a test prep place that makes their own practice tests that are around 50-100 points harder than the CollegeBoard ones so I think if I took the actual thing today I’d get a 2000ish. Does anyone have any tips on how to raise my score with only 2 weeks left? Thanks!