I’ve had multiple bouts of nausea, some of which lasted a few hours, others dragged on for a week. The last bout was around Christmas and I actually vomited (we had guests over for dinner, so that was fun). I felt much better afterwards and haven’t experienced any nausea since.
Since I find it almost impossible to eat when I feel like throwing up, I have little food advice to give you. I stuck with mugs of chicken broth dusted with a grating of parmesan because my mom used to make that for me when my tummy was upset as a kid. Also, I found that a tablet of Dramamine helps. It works just as well when you’re stationary as it does when you’re being jostled in a car or boat.