Agreeing overall with the other posters: rescoring probably won’t make a difference- and almost certainly not a 2-4 point difference, which is what you are looking for.
However, getting your FRQ back for $10 might be worthwhile, if you will then take the time to take the grading rubric “2018 AP Human Geography Scoring Guidelines” and figure out why your answers didn’t meet the expectations.
Fwiw, nearly 30% of students who took HG this year got a 1. According to the Score Distribution Report “students generally scored very well on questions re: agriculture/rural land use, but struggled with questions on industrialization, economic development, population, & nature of geography; stronger understanding of those topics will expand the % of 3,4,5s.” and “many students do not appear to have learned about gentrification (FRQ2): 25% earned 0/6 points on it, & are thus getting a 1.”