My classes is the only class with a different policy and it’s costing me my degree

Hey I need help I’m in a 1203 with a teacher called Alina. So far I have reached out to every 1203 teacher this term they all have a policy that the final can replace the midterm if the final grade is higher since a cumulative final. Every single section in class except my class, which I think is unfair. I am planning to go to BSN and there is a limit on retakes for prereqs and I’ve reached my limit. Now my midterm grade will cause me to not reach the required grade minimum for my course and with no retakes left I’m disqualified. For my program which I put years of work and dreaming into it, really hurts, especially since I’m the only one dealing with this because my class is the only one grading differently. I have two questions. Is it fair and how is it fair that every single class in the same section and same term same class has a different grading scale than mine that allows for a second chance for improvement .and my third question is if it is up to the instructor why isn’t it clear that one instructor’s class is a completely different and more challenging, grading scale than every single others. This should be cleared before registration since it’s a big difference. In my opinion The semester isnt over, so my last hope is to find a way that my teacher can also match all the other teachers style to replace the final with the midterm if the grade is higher. Is there anyone who can help with an unfairness policy like this?