Is sick of her stupid job

*curls up into a ball as I whimper* I'm so sick of my job. I work at a nursing home called The Waters of Clinton. I love the residents, I like making some money, but I hate what my job is. I'm a PRN, which means that I usually only come into work when my co-workers want or need me to. The worst part is that every time I make plans, I get called into work, usually by my co-worker Summer. (I'm not over exaterating either) I'm so sick of it. Today I made plans to go swimming with my mother, her friend Bob, my brother and my friend Robert, but my work place called saying I have to go in. My other co-worker was out of town and Summer had a doctor appointment at 4 in the afternoon. (I hope she at least tried to make the appointment earlier instead of just instantly making it at 4) Shelly told me that if the state did not come to do inspections today, I would not have to come, but I have to. It's at times like this that I feel so tempted to just say "screw it" and quit my job. But I know that would be irresponsible, so I won't quit until August 1st (Since I'm moving on campus, I will get a on-campus job) I'm also sick of how it's nearly always Summer who calls me into work. I mean, it's like she'll call me, give me her reason why she can't come in, I tell her that I already made plans, but she guilts me into it. Then one time when there was this event called the Red Eye Night (as in you stay up all night) that this church does once a year (I have not been to it in 2 years) and my friend Robert and my cousin DJ asked if I'd like to come, I knew that I had to work that Saturday, so I knew that the only way I could go is if Summer would switch the days with me and she work Saturday and I do Sunday, so I called her asking if I could, but she said no because she already made plans. I tried to convince her, but she would not switch with me. It felt so unfair because I've cancelled or postponed my plans many times for her, but she could not do it for me this one time. *sighs* I just really can't wait to get out of there. Now I'm really mad, I just saw my co-worker Summer's status on Facebook and she wrote in it that she's going to Terre Haute to hang wish some friends for the afternoon and night. She lied to get out of work!!!!! I swear if it were not for the fact that I don't want to start anything with my co-workers, I would so chew her out and tell our boss! Plus, I can't actually prove 100% that it's true. So I have no choice but to cancel my plans because that b**** wants to hang with her friends.