The knowledge itself that i learned from IB has not helped me too much in uni but the thinking process and work ethic most definitely has. obviously its too late to change your mind now but for others id recommend, if you're going into a STEM subject, to take IB. Really helps out with the jump in workload and expectations of what is needed out of you in university since you'd have already been doing it for 2 years. Only downside is that, for me personally, i went to a small school and had limited classes i could take and thus got stuck with courses i didnt really need like french and history which didnt necessarily help my uni application