Well, you are still in your 45, still very young to menopause. I could certainly say, It's more on pregnancy thing you are having now. Vomitting is one of the many symptoms of pregnancy. And there will still more of it that you will be experiencing as the days goes by. So goodluck! Be happy and enjoy that wonderful blessing you are having.
Menoupause and pregnancy have something in common. Thats why you become confused with the absence of your menstruation whether it's menopause or pregnancy. But I agreee with loley that's i think it's more on the pregnancy kind of thing rather than menopause because your story tells many side of it as pregnancy.