Wow! That feels like a LOT is going on and I think there is only so much you fit on a plate no matter how good the buffet looks.
How long has this "giving tuesday" been a thing? I don't I've ever heard of it, also, it's a shame it has to be a thing.
Sheesh, I hope you can step back from a few many things and care for yourself and the pets, especially the dog. Good doggo will make you feel better after you both go for a walk.
Remember, no job, club, committee, publication or person is going to collapse if you take a breath and step back. All of it will be there again when you're ready.
Hang in there!