Grade Grievance Question - Humanities class
So basically I am an engineering major who needed a humanities and took an LMC class and thought it would be easy. It was very time consuming, we constantly had to give speeches and write essays. Which is fine. But I was very sick this past semester and missed 9 days so my participation grade was going to be cooked. Luckily it all got Dean excused and the professor let me make them up by writing an essay on a reading for each day. Then my grade was about a 93 plus the 1.8% extra credit to final grade for an extra assignment I did. In the last day before final grades were do she put in the grade for the final speech which I got a 72% bringing my final grade with extra credit to an 89.55% I quickly scheduled a call to talk about it and she refused to change anything because my effort in class overall was not “A fitting.” Like even if I got an A she wasn’t going to let it happen because of that. My argument was that the final speech was a redo of a previous speech and the previous speeches rubric that she sent me was wrong. Meaning she gave me the wrong feedback and only gave me the right one at 10:30 pm the night before when I had already finished the speech and gotten ready for bed. I responded to the email saying thanks but just thought it would be some quick adjustment, not a completely different rubric. So when I gave my final speech tailored to the feedback of the wrong rubric it was unfair that she graded me for feedback from a different rubric. Additionally, she argued that I got the feedback in person 3 days in advance which is true but I can’t remember everything and everyone in class got to use the rubric. If the final grade had been a 75% I would have a 90% in the class. It just feels unfair because that whole final grading is messed up and she probably would have done it to other students but not me because I was out so much, BUT I was sick.
So my end question is: do I have a case to file a grievance?