I know what you mean I hated being in a car after 32 weeks with my first it was literally torture and my husband didn't understand until i threw up all over the car. After that he knew better than to even ask me to go on long trips with him. Aww man that's no good try eating crackers or drinking something fizzy that always takes my nausea away.
I'm close to my 6 months so sitting in the car for that long *****. I hope he gets over it. If its any consulation to him I feel like puking all over the place for some odd reason.
Until a man gets pregnant they will never understand! I'm sure he'll get over it hun.