I won't complain

I won't complain but I will vent just a bit. When I left work on Friday, I was scheduled to work 19 hours this week. I wasn't exactly happy about having only a few hours but then I thought about it. That will be nice to have an easy week and get myself prepared for working 40 hours again. Today was supposed to be from 9-11 and then 3:30-5:00. I worked the 9-11 and said I was going home and I'd see them at 3:30, when they said "you're supposed to be in C-1 from 11-6. Imagine my surprise when I was told that my schedule had been changed and I was supposed to have gotten called about it. I'm now scheduled for 38.25 hours this week. How can I complain when hours equals money?