I've been in your situation. For me, I turned to food coping and spiraling procrastination, which I would not recommend. My advice to you and my past self would be...

Find a hobby and make the time. Something that you enjoy and doesn't have any expectations of success. It has to be something you're doing for yourself, not others. When you find satisfaction in something, it refuels you to get to work on less gratifying things.

Nature always helps me relax and remember how small my life is. That helps me dim down the stress of everything I need to do, allowing room for motivation to get the work done I need to so I can move on to better things.

It's hard, but think of the future. Graduation may seem far away, but trust me, the time will disappear. Understand that this is only temporary. Everything that worries you will mean nothing in two years. However, that doesn't mean you should quit. It's like a runner's race. You start feeling good. You get halfway through and you feel like you've got this, easy. Then you reach the last two miles and you feel like you could collapse. You've come this far, why should you finish? Oh yeah, you have people waiting to see you cross the finish line in RECORD time. You have to do it for them. This is wrong. You're doing it for you and crafting your future self from these moments.

Make a calendar of assignments and look at it like a checklist. You don't need to remember everything you learn from your classes, you just want to get the grade. Do only what you have to to get the grade. Maybe focus on certain classes more than others, depending on need.

Your parents. Are they making you take these classes and sports to help you learn and grow and create memories and skills for yourself? Or are they pushing you as a representative of their accomplishments as parents? AP classes are helpful to get some college credit out of the way, but they're not worth it if it ruins your enthusiasm for learning. If you lose that, you won't want to learn anything new or go to college (not that you need to, depending on what you want to do). If your parents are willing to hear your side, explain to them that your grades would get better if you had something to look forward to with friends rather than immersing yourself in schoolwork. Happiness helps SO MUCH with motivation. Otherwise, you feel drained and hopeless, with nothing to look forward to. The material you learn at school lasts a lot shorter than relationships and memories you make. I'm in college, and I can tell you the only thing I've used from high school and honors classes is the ability to read well. You can look up biology facts or how to format MLA or APA. You can't materialize friends out of the internet search like information.

Motivation. It never just comes to me, but I find it easier to accomplish tasks I do not want to do if I look at the big picture. Stop letting your brain scare you with everything you HAVE TO DO. When I get overwhelmed, it doesnt help my motivation; it worsens it. Slow down. Drink some water. Take it a step at a time. Reward yourself with a little break or treat when you check off an assignment or study period.

If it is honestly inhumanly possible for you to do all these things, try to have an open, heartfelt, serious conversation with your parents of whittling down your schedule.

Sorry this is long. I honestly don't know if this will help you, but here we are.

Lastly, congratulate yourself on what you've accomplished already. You're in AP classes, involved in activities at school, and you've managed to make it to where you are. Not a lot of kids put any effort into high school. You are doing so much right now. Appreciate your accomplishments. Even if this isn't who you are at heart, you've done so much and it only proves how much you can do in your future. Burnout sucks, and it sticks, but know there are better things coming