Stressed Off the Clock, Perfectly Calm When Driving

As the title says. At home I'm constantly anxious with no real cause but when I'm on the road I feel fine. Started as a seasonal PC driver this week and past the stress of day 1, I feel like I've taken to the role like a fish to water. I go the entire work day feeling great only to get home and be hit with waves of deep anxiety that are even worse when I wake up the next morning. I'm just curious if this has been the case for anyone else as they started driving?
(PS. I'm not normally a very anxious person at all and home life is going great lol so it's definitely related to the job.)