freaking out about the TEAS

I'm FINALLY apply to 4 year nursing schools this year, after spending nearly 5 years at a community college after changing my mind a few times, getting my CNA...anyways.

The majority of 4years here, I think all, I'm applying to require 80% minimum on the TEAS.

To be a competitive applicant, I feel I need to be in the high 80s, preferably 90's.

I bought the ati manual, studied it, took practice tests. I got a 72% as high score. I rescheduled the test for a few weeks later after getting such a low practice score. Now those weeks have passed and I'm supposed to take the test this Saturday.

I'm worried I haven't spent enough time studying. I don't feel more prepared. I'm freaking out. Maybe I should reschedule it again. Or maybe if I don't do well Saturday just retake it? Some schools only accept the first score. Ahhhhh.