My mom is only 68 and and over the course of two weeks, shes' gone from being completely independent and maintaining her own affairs/doctor's appointments/medicine, to being completely delusional, confused and unable to care for her basic functions. The first day (July 4th) she had an issue, she had some type of manic episode where she was up all night and hallucinating and having paranoia, and this lasted a couple of days after which I took her to the ER and they said she had a UTI. After being admitted for 2 days, they released her, but the confusion and behavior changes continued, so when we came back to the ER, they said it was due to the antibiotic she was give upon release (Levaquin). Couple of days later, the confusion and behavior is still out of character so we come back to the hospital and they keep her for further testing, now all the doctors are saying she possibly has dementia. HOW could dementia come on this quickly?? Real talk, she went from being 100% fully independent and functional to a shell of herself. So far she's had a battery of blood tests, CT scan, MRI, and is having an LP today, but at every point the docs are saying they can't find anything to indicate an external issue like infection, stroke or other injury. Has anyone had a loved one have dementia come on this quickly? She actually lives with me so I've seen/interacted with her everyday for several years just about, and the only changes I've seen in her behavior have been age related general changes (couldn't find keys, lost grocery list, forgot a name temporarily).