Why do the truck, the road, and the pressure hit me all at once?

You say the job overwhelms you. Look closer: the job is not one thing. It is the pre-trip check, the merge, the weigh station, the delivery window, the noise in your own head about all of it at once. You have stacked these and given the stack a single name — "too much." That name is doing the damage, not the work. A blurred wall feels unbeatable. A checklist does not. The equipment has a known state — checked or not checked. The road has a known task — this mile, this exit, nothing further. The pressure is mostly imagined future, not present fact. You are not weak for feeling crushed by a blur. Anyone would be. But you are not required to keep it blurred. What you can control right now is small: which single task is in front of you this minute. Not the whole route. Not the whole week. One gauge, one mirror check, one merge. Choose to see only that. The rest is not yours to carry yet.