Just after I posted last night, Mom got really tired and nauseous. The rest of the night was pretty rough, but she slept a lot last night and had a good day today, hanging out with friends, eating well and exercising. But in the early evening, the nausea hit again. When I spoke with her, she was hunting for some saltines and saying it wasn't too bad (I'm guessing that means not as bad as last night).
So, here's hoping that this eases up and doesn't last all month.