i average over 1000 orders each week, made my first mistake yesterday

conservatively ive processed 25000 orders perfectly this year, before making my first mistake. none of the new hires have seen me in crisis mode...literally running to keep up with orders. im beet red, my lungs are ready to explode, my heart is pounding, ive yelled some today and kicked an empty box around to relieve the frustration. continue working thru both breaks to keep on schedule. good news is i didnt kill anyone. UPS damn well better show up today. charging 1000% premium for overnight is insane!! back to the grindstone