Apparently they don't work for gastroenteritis/norovirus, but can ginger pills relieve upset stomach & extreme nausea caused by severe anxiety?

Worth trying: Ginger -either as a tea, freshly crushed up with honey, or even as a strong 'candy' you get in the Asian stores may help with nausea. There are a number of scientific papers in the literature touting it's benefits there - from pregnancy induced nausea, nausea from chemotherapy, sea-sickness, and even more problematic diseases. Everyone's a little different, but it couldn't hurt to try. Feel better