Grandma's declined: immobile, many falls, only knows first name and strips. Is this stage 7?

Gma in hospital w/ severe UTI test clean 3days prior. In the past month my grandmother has refused to eat or drink several times then begins to slowly eat and drink again, legs give out on her, coherence has declined severely, hallucinations, tries to get up and falls, she only knows her first name and no longer recognize my face. Im her only grandchild and was raised by her and taken care of her until 2007 when she entered assistant living. I am 33 yrs old and she is 95 yrs old. The dr will try rehab , change of meds and psych evaluation but I wanted to know if this is the last stage of Alzheimer's. Im an optimist and in denial but just wanted to hear some input from others who may have or is going through a similar situation. Thank u for listening. :'(