Hubby doesn't understand pregnancy.

He constantly says I'm being a little baby. I have one child who is 9 months old, and I'm 12 weeks pregnant. This is way worse than with my daughter, everything makes me sick, feel faint, and gag. The smell of my 9 months bottles send me to the toilet. He tells me to grow up and I'm being childish and I'm milking it. He says that google has put in my head that I'm "this sick" and that the symptoms aren't that bad. I try to feel better but but with this awful neasea and throwing up over small smells makes it so hard. And I'm getting fed up with his constant remarks.. what would you do or say to make him understand?