I assume you and her are millennials. Your generation is not very smart to begin with.
Y'all are so hooked on social media that nothing else exists.
It is NOT your fault, it is hers because she might, well here are some possibilities -
If she is under 65, she likely has early onset Alzheimer's. If she is 65 or over, than it is regular Alzheimer's.
I know you want to help her but the only hope for her is to go see a mental health professional. If she has any form of dementia, her mind will slowly fade. She doesn't have to live out her days in a nursing home though, she can be put on home hospice where she can stare mindlessly at her cell phone and drool in peace while watching cat videos or updating facebook. The nurses will come by a couple times a day to give her meds and empty her bed pan and wipe her butt so she doesn't have to take any time away from FB or twitter.
The reason she was trying to call you is she got confused and thought you were the nurse who is suppose to come by and help her use the restroom.
Always remember that YOU are the most important person in your world.