CNAs schedule

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Work is driving me crazy. Most because of my schedule. I'm the only one, I know cuz I asked my coworkers, who only gets 1 day off in a row. Everyone else gets 2 or 3. And today they wanted to send someone home because they over scheduled. I asked to go home and my coworker was upset because she set up an appointment to look at a house with her boyfriend- even though they were both scheduled to work. They both expected to go home. She made me feel guilty for going home but yesterday was my only day off this week. Why would they schedule to do something on a day they knew they worked? I'm mostly venting! I shouldnt feel guilty. I need my sanity! 1 day off a week is not enough! And just to add the couple who got mad that I left are taking the entire next weekend off to go to Vegas. I wish I could even take more then an added day off.