I have one like this. It’s a lifesaver for going to post-op appointments.
https://www.amazon.com/dp/B00EE84GGI
Grab a mastectomy pillow for your seatbelt, this was a huge game changer for me. Just search them on Amazon. Mine is this one if you want it https://www.amazon.com/dp/B00EE84GGI?ref=ppx_pop_mob_ap_share