Burnout?

I am a high school junior. I get good grades, a mix of A’s and B’s, but it hasn’t always been that way. Freshman year I had a solid C average, so every grade I get is very important. I’ve been feeling burnt out lately and I need help.
First of all, let me get something out of the way. I was diagnosed with major depressive disorder and generalized anxiety disorder. I take medication which stabilizes my mood but makes me very tired.

My classes this year are(in order of most difficult to least difficult)
Dual Enrollment Anatomy and Physiology I(a five credit college class)
Creative Writing 2( lots of work, my magnet school takes arts very seriously)
AP Language and Composition
Algebra 2 CP
Chemistry Honors
Vocal III
US History Honors
PE 2
I love learning but the busy work is tedious and I find it hard to focus. I am very involved in my writing extracurriculars and I work a part time job. Its really bothering me that I can’t stay focused in class and while studying because I’m used to being the smartest kid in my class. I need help- anyone else with anxiety, how do you manage schoolwork? My grades aqre starting to slip!

I find that when I get frazzled and have panic attacks, a schedule is what works best for me. I try to map out my week every Sunday. It makes me feel productive and I know that I’m filling up a time slot with good work. Do you get distracted easily when studying at home? Do you need new study techniques? I’d be more than happy to give you advice too. I find that my routine gets me back on track if I slip up a bit.

Thanks! I’ll try to formulate a schedule.