What priority nursing diagnosis could be made for Mrs. Johnson?

As a part of your home care experience, you are assigned to visit Mrs. Johnson who, in addition to caring for her infant granddaughter, is also caring for her mother, who is increasingly agitated and aggressive secondary to Alzheimer’s disease. When you go to the home, you find Mrs. Johnson tearful. She says, “I can’t do this anymore. She doesn’t like anything I cook. She calls me two or three times during the night to sit with her; sometimes she doesn’t even recognize me. The baby is constantly crying; I think she senses my stress. I feel so overwhelmed.” What additional assessment data would be important to gather? What priority nursing diagnosis could be made for Mrs. Johnson?