What are the symptoms of confusion, or delirium-like state.

My Mom had delirium issues... example, while in bed she would be kicking her feet and legs like she was running a race, running for her life, and her arms would be reaching up.... and she would be crying out "I am falling" over and over. It was pretty scary to witness... finally a calming med was given to her and that helped.

Oh, loss of time, or where you're at, are 2 more.

Sleeping a lot, when awake taking about stories that are either in the past, or are of the imagination, to name but a few

You mean what could be causing those symptoms?
Most of us are just caregivers like you and have no medical knowledge, but anyway you haven't given enough information for us to even try to give any helpful feedback. If this is something new I suggest you take them to the doctor for a full evaluation, or if the problem is severe enough urgent care or the ER.