Welcome to you and Bailey!
I would have to say that something has definitely changed if Bailey used to ride well and all of sudden isn't. A visit to the vet is in order to rule out any physical problems first. One of my dogs used to get car sick, but she was that way from the first car ride til she was about 6 or 7 years old. She never paced or anything, she'd just ralph if she was in the car for more than 15 minutes or so - especially if the road was bumpy!