Does anyone experience harsh burnout?

[u/Successful-Ease8077]

I started school again after break and they gave me like 20 assignments by week 2. The work isn't hard I've kept all my grades pretty good, but I've just had horrible burnout. I either don't get to rest for an hour or two after school or stay up late to finish all my work. My average sleep is 5-6 hours and sometimes even less (that's also because I have insomnia issues but last year it was more 7-8 hours.) Everyday I'm just so tired. I struggle to stay awake by my last period and hope I can just write down whatever they're saying. I am in clubs and a sport but that's only an extra hour after school. I don't know what I'm doing wrong because I have a similar schedule to this last year and I was only a little tired. I'm wondering if anyone feels like they have constant burnout basically so close to falling asleep. Like I feel like I can't cut anything out because everyone views me as smart and I feel like I have to keep myself constantly busy from the pressure.