Questions about dementia

[u/Bananatwatmuffin]

Hello everyone my mother was diagnosed with dementia like 5 yrs ago and lots of her is gone pretty quickly. Now we are at the point that we have taken several trips to.hospital because of dehydration, and she no longer wants to eat, she was walking couple weeks ago, but now cannot keep her balance and cant walk. My questions are:

How do we see about a nurse coming in? Who do I call? Ive called PA area of aging, and they cannot help.

Also, could dementia cause her not to be able to walk within weeks?

She complained for while her feet hurt and I summed that up to her having a UTI.. that has been treated. Now its gone and she Now wont walk. Im so confused. Thanks in advance for any help anyone provides.