One year old vomits in car?

K

My 14 month old girl wakes up around 5-6am every morning and I give her a bottle of milk. She goes back to sleep and we leave for daycare around 6:45. Twice in the past week, she has projectile vomited curdled milk all over herself after about 30 mins in the car. Other times, she’s fine in the car and has never had any other issues with milk. Does anyone have any advice? Do you think she’s getting car sick? She’s still backward facing but if she’s car sick, should I change to forward facing? Thanks!!