Dan,
Keep in mind all my life when I even had tough exams, I felt nausea!  When I drank alcohol, other than beer, I got nauseas.  When a doctor mentioned I might have a side effect of nausea, it was all over.  When I heard about five times that the treatment and medicine(s) could cause nausea, I got a little queasy in the stomach.  Even scuba diving if I ever swallowed a mouthful of salt water, guess what happened?
We are all different and my shoe is bigger than yours, too!
Ed