I have never seen a pilot stressed in an airliner other than normal problems with ATC when you need them but they don't respond because they are occupied with something and you need something now. You are only stressed because you have to deviate from your clearance and no one will talk to you.
My retirement flight I was stressed because we were not cleared for the approach on a short runway and I was way above the glideslope before they finally did and high dived it to one of my worst landings with all my friends on board. The frequency was jammed and they forgot us. I wish I had just gone around until I could have had a normal approach. We had a great steak and lobster dinner for all that night however.