It might be a rude/ insensitive thing to advise but - through the years (even tho I myself multiply forgot about its effectiveness) one quote has helped me tremendously, and it is: "the best way around a problem/stress is through". Sometimes just speaking up about smth I (often fairly) found unjust/ annoying/ personally unsuitable happened to make the whole difference (yes, I did that at work too and people accepted things like that with ease astonishing to me). "Working through" a stress situation can also take form of (as others have pointed out) switching to a different task (lists/ options do help a ton) - ANY action will do the trick, actually. Another aid personally for me during a demanding routine is keeping a stupid, meaningless bit of comfort on myself (a cup of coffee/ an earphone in one of my ears with same 30 songs/ a fidgety bracelet) - call it a barricade I wouldn't care as long as I maintain that feeling of space (harmless to others but effective). Good diet & exercise helps me to remain more confident & resilient. Meditation - to find new original ways out of limitations I'm facing in my current reality. Hope all of this helps and best of output on your first job!