Oh God, the only time I was ever sick when pregnant was after dh spilt milk in the carpeted boot of his car, and then sprinkled cheap aftershave over it in a vain attempt to mask the smell. The sun came out, it fermented a bit more, I drove barely 100 yards and opened the door to vomit in the road!!
I don't know if its a smell you can ever shift from cars TBH as its not as though you can get in there with a carpet shampooer etc.
DP once had one of those little plastic pots of milk with a peel back lid lying around in his car for ages until one day it exploded. It stank no matter what we did to get rid of it. Eventually he sold the car.
Does anyone know how my Dsis can get the stink out of the footwell of her car? She spilt three lattes over it and it hums! Despite trying vanish carpet mousse, dettol wipes and 1001 stain remover, the smell is getting worse. That lovely sicky smell that catches the back of your throat