Update. My mom says she’s taking 1000 units if Vitamin D3 her doctor prescribed. Her level was 14. Her B12 was within normal limits, but declining rapidly. Since she stopped regular injections it’ll be low again within months. But, we are focusing on the D right now. She seems better physically. She’s in PT and working on her mobility. She says she wants to regain it, but is not very motivated. Her sleep has improved.