Drink water throughout the day, and rather than meals, eat small snack sized portions throughout the day. If you're having trouble keeping stuff down, try crackers and ginger ale.
If all else fails there are antineasuea meds the doc can put u on I have thyroid pills I have to take on an empty stomach and can't eat for an hr after that doesn't do well with the nausea n vomiting so I went on myclezine (probly wrong spelling)