Preliminary Exam CSAT November 22

1. I opened the bag and packed the boots in; and then, just as I was going to close it, a horrible idea occurred to me - Had I packed my toothbrush ? I don't know how it is, but I never do know whether I've packed my toothbrush. My toothbrush is a thing that haunts me when I'm travelling, and makes my life a misery, I dream that haven't packed it, and wake up in a cold perspiration, and get out of bed and hunt for it. And, in the morning, I pack it before I have used it, and it is always the last thing I turn out of the bag; and then repack and forget it, and have to rug upstairs for it at the last moment and carry it to the railway station, wrapped up in my pocket-handkerchief.

What makes his life miserable whenever he undertakes travelling?