Why does always happen

Just whe we start to get on a roll something always happens. This time it is work. I hate the fact that I never know when and how long I am going to work. I worked Tues all day and half a day yesterday now I am off until at least Mon. This sucks. I want a job that I know I am going to work continuously but here they don't exist. I just want to be able to pay the bills and save some money for moving home. The oldest one just wants to go to prom and get this year over with. Thank God he has a job. He is only working 8 hours a week though. How is he going to save any money over the next 3 weeks? Please God give me a break.