Writing about/addressing mental health challenges in your college application isn’t generally recommended : 1. because there will be literally thousands of applicants with perfect or nearly perfect stats applying to the same schools, you’ll be assessed along side them and schools will not recalculate your GPA to a higher one based on what it could have been hypothetically if you didn’t have your anxiety challenges, and 2. Schools are wary of admitting students who may not be able to handle the stressors of college.
I’ll also add that a 3.8 uwGPA is not a low GPA. You have taken a very rigorous course load and there will be many schools excited to admit you.