Very worried- Will Colleges Rescind My Admission?

I’ve been a straight A/A- student for all of high school and have taken the most rigorous courseload at my school (10 APs, rest honors). However, this second semester, my AP Government grade will likely be a C+/B- but my final grade for the class will be a B and my final grades for my other classes will be As. Will this one B affect me negatively (even though I will have a C+ for 2nd semester) at my schools?

Ps: I’ve gotten into to a variety of schools like Pitt and UVA.

You should be fine. The general rule often quoted on CC is to avoid D’s, F’s and felonies as well as ill advised social media posts.