Stressed

I had a bit of a stressful afternoon today at work. As usual, on the first day back after a few days off, I really didn't want to be at work. I hadn't had a good night's sleep either, waking every couple of hours, which obviously didn't help.
Late in the morning, just after the site manager left to go to the other site that he manages, I noticed that he had changed my shifts this week yet again. He had confirmed my hours to me last Wednesday night as I started a night shift. Apparently he had changed the hours again on the Thursday morning, but I had been off since then and he had only put the changed schedule up on the board about half an hour before he left site. He had changed my 2 night shifts on Thursday and Friday to day shifts, meaning that I would miss my interview on Thursday at 13:00! How bloody typical I thought!
I began to get really wound up, that he had done this to me again without asking or even telling me. I began to consider all my options:

• Do I tell him I have an interview and hope he doesn't cause friction for me at work?
• Do I lie and tell him I have a dentist or optician appointment and risk only getting a couple of hours off?
• Do I say nothing and just call in sick for the day?

I was really getting wound up with my bad luck and getting really angry about it too. It seems that I just cannot get a break lately! When he eventually got back from the other site I just mentioned it to him and he immediately said he would change it back! Just like that! I had been stressing over nothing! The Bastard!

He later asked if it was for an interview so, as he had not created any more hassle I was honest (probably the wrong thing, but I am not good at telling lies, so the best option for me I guess!).