Will my acceptance be revoked?

I’ve been accepted to MSU, and have already committed. My grades have been falling since last semester, and I’m not doing very well in AP Calculus right now. I could possibly go as low as a D or even F. I got a D+ last semester. All of my other classes throughout my high school career have been excellent. I currently have a 3.7 GPA and a 29 ACT.
Could my admission be revoked because of this???

No, it will not be revoked likely. However, they may contact you, and you will have a lot of explaining to do!