I wouldn't wait, I'd be on the phone with the ER clinic right away!

Eating things like that, particularly that amount, and with the addition of lethargy and vomiting is red flag. Dogs can get pancreatitis from things like that which need to be treated right away. Also some of the sugary human sweets can contain Xylotol which may not have been marked on the packages which is toxic to pets.

Please call the ER vet and at least get their opinion on whether it's something that can wait until Monday.

Good luck, I hope everything turns out fine.