She will refer to me in talking to me by saying something like me and Fia (me) did this together. The other she told me that the person who cleans the bathroom didn't throw the garbage away. I am the only one here with her. She angers when I ask why she speaks to me as if she were talking to someone. She also imagines that she is in a duplicate of our house and asked to go home. I am extremely upset and getting sick from her verbal abuse. The neurologist does not think she is that bad because she was acting normal on the telemedicine call. Can someone advise me if this all could be dementia?
Sorry you are facing such difficulties with your mom. I am not a doctor or an expert, but I've observed my mother's gradual descent into mid-stage dementia (Alzheimer's and vascular dementia diagnosed by her primary care, her neurologist, and her neuropsychologist). I've witnessed a lot of strange behavior. Mom frequently refers to me conversationally by name and/or as "my daughter" while she's talking to me, as if she doesn't know who she's talking to. This identity confusion has been occurring fairly regularly for 3 years, gradually getting worse and more frequent.
When mom does this I play along and don't try to correct her. She comes back to reality on her own; i.e., referring to me directly by name, or by something she says I become aware she knows she's talking to me. No need to rattle her back to reality.
Your mom's confusion calls for a professional, in-person evaluation. Will her doctor do that? If not can you find one who will? You may want to secure
POA for legal authority to make medical and financial decisions for her. Has your mom always been verbally abusive, or is this a new development? Either way, abuse is never acceptable. You mentioned you were "the only one here with her," which suggests you may be living with your mom or she is living with you. If this is dementia, and it may very well be, it will only get worse. It's not too soon to be thinking about alternative living arrangements like assisted living or memory care for your mom.
I am getting so upset that I am getting sick. I am working from home now but when I have to go back to office I am really afraid of leaving her. I cannot do what you mentioned about the POA because she won't sign. I mentioned that we should sell the house and she should go to assisted living and she got furious.