It was mentioned at work about my attitude toward a coworker. Wouldn't you get tired of explaining something over and over again? Maybe I'm working too much overtime this week.

Your co-worker is probaly as oversensitive as some of the clients I have to deal with - I feel like I'm walking on eggshells when I have to talk with them!

Probably, I didn't think I was raising my voice even though I was annoyed.