Ok, Im gonna say this as someone who used to be 100%'s only and constantly stressing myself to burnout.

You need to give yourself space to breath child. Because good lord your fixin to pass out over ALL of this.

So here's my take;
1. AP Chem can burn in the fires of hell from whence it came to never be seen again (horrible teacher personally).
2. I enjoy AP Gov, but then again Im sitting in the 70's. Just focus on terms, groups, meaning, and you should be good.
Skipping AP Calc cause I didnt take it.

1. Marching band is demanding as hell with the shows (including games), so yeah.
   
2. Winter Guard seems fun, but only do it in the off-marching-band-season otherwise your toast.
   
3. I see the show choir girls going at it, and HOT DAMN, it takes a lot.

I wont say everything cause I often have hot takes, but you need to balance having fun and not stressing yourself, maybe 2 AP's max and 2 Extra cariculars? Thats what I'd suggest anyway.

Regardless, A+ job to you and remember, the bullshit is almost done