Mom, not sleeping tonight up all night talking to herself.

I have to get up at 0430 for my shift at the hospital , and it's midnight. I've done all I could do , she had her seroquel , she had her nightly ensure , I changed her tucked her in , she complained her room was to dark so I put another light bulb in her lamp. Her room now. Looks like Vegas . She sees her neurologist on Tuesday , if I live through my next 3 12 hour shifts at the hospital .she dosent have a UTI I had it checked 2 days ago at her pcp ... She's 80 with Dx of Alzehemiers and dementia , she's a retired RN so I can't tell her anything . I'm a RN and she tells me she dosrnt need my advice ...omg .. the woman will not stop talking ... I'm gonna have to sleep with her talking all night ... Good grief I'm gonna go out of my mind ... At least then I won't notice her talking all night because I'll be to crazy to notice .. I'm starting her on melatonin ... Any one have any ideas how to stop my mom the chatter box ?