Oh I hate it when they scream in the car! It's soooo stressful to try and drive at the same time. Oskar "grew" out of it I think. Once he could see a bit better is when he seemed to calm down a bit more, so probably around 5/6 months he got really good. I used to wind the opposite rear window down to distract him if I wasn't on the highway. The mirror works a treat too. There's several you can try, they go at bub's feet and some of them have a "toy" thing they can kick too. I hope that she gets better with the car for you asap!