Work Woes

So I received an email from my boss. It seems the woman that I asked to cover my job forgot to tell me she has an appt to go to and in addition she will be leaving work at 3. She hates me. She did it on purpose. Oh yes everything will be covered if you dont make it in. BULLSHIT! Why do I insist on trusting people that have proven time and time again that they dont deserve my trust? Why do I let people fuck with me? I have worked so hard for that job. I am so upset. I need my job. The email was short and very unfriendly. My family cant survive, I cant survive without my job. Im scared and Im pissed at my luck. I am angry that people would expect me to drive 45 minutes in a summer car with bald tires and a screwed up transmission with a 9 month old baby in ten inches of snow. I am angry that they dont care enough about me or my baby to tell me that it will be okay if I miss a few snowdays of work. For all the overtime and caring that I do for people I just want to scream my head off.