Aortic Dissection

I had aortic dissection surgery in January of this year. I was told to sit in the back of a vehicle and protect my chest by placing my heart/coughing pillow under the seat belt over my heart. I know it could take a year for the sternum to heal. I’m terrified of sitting in the front seats and the air bag injuring my chest.
How long will you sit in the back of a vehicle covering your chest with the pillow?

all good by now smithy. i sat with up front with pillow straight away. pretty much healed after a couple of months we are.