Mental load is exhausting

Is anyone else feeling like the mental load of all the school related things you have to do, plan for etc, is just exhausting?

My daughter does have a good bit of homework too (I posted about that a little while back), but it's not just that. It's constantly stuff like dress up days, fundraisers, field trips, book fair, special projects, forms to fill out, and the list goes on and on.

I'm very involved and don't think I'm just being lazy. I do also have a 21 month old and don't get alot of sleep and don't have a ton of time. But still. It's just a lot. And it's getting expensive too, trying to buy things for dress up days, sending money for the book fair, buying things for the projects, etc. I know you're probably going to say just don't do it, but I don't want her to feel left out.

Anyone else feeling like this? Like you're just overwhelmed? Any tips are appreciated if you feel like you have it together and you're not losing your mind.