Congratulations on a great record!
Is there a math class(IB) that does include most of Calculus, or does your school offer APCalculus? IF so, and significantly more than 10% of the school takes such a class, I think your rigor may not be on par with others with your GPA/rank range, so It may lower your chances some. Same issue with the lack of Science senior year, if there were AP/IB sciences available that you chose not to take. Don’t worry about it too much, it might not make a huge difference, but in general many of the schools toward the reach-y end of your list expect to see 4 years of science if that is available at your school .
Do more than 10% of your school get in to UNC-CH? if so, it may be a likely not a match, depending on your assessment of your rigor. UNC is a fabulous school and you are in a great position for acceptance there!