You’ve got this.
Unless your essay was rude (“NM program is stupid!”) or truly abysmal in an intentional way (incoherent), so far as I’ve read (in 7 years of being on the NM train for 3 kids) you’ll be just fine.
My understanding is that the grade limitations are really just if you got one or more C on your transcript. (One might be OK, maybe, but more than one is dicey.)
From what I’ve read over the years, if you’ve got the PSAT and SAT scores (you do) for NMSF and you complete the paperwork properly, the only way you miss making NMF is for grades (1 C may be OK, worse than that likely not) or major behavior/criminal issues that come out with the recommendation from your guidance counselor.