Alicia welcome! I am 46 years young too
The Yaz/Dom combo is used to mimic a pregnancy so it is a bit like having morning sickness which is caused by the changing hormones.
Talithasmom is right taking your Yaz at night might help also make sure that you eat a bit of protein when you feel nauseous that can help. A string cheese, a hand full of peanuts or some other source of protein. It worked for me during pregnancy so it should help in this instance too.