Frustrated

The last 24 hours or so have been very frustrating for me. I am on restriction with my left wrist because of tendonitis and my boss has been out because of back surgery for the last couple of months so her overbearing boss has taken over. Last night she came in and told me that I was suppose to close by myself which meant that I would had to have mopped the floors (I work at Subway). I reminded her that I was unable to do that because I wasn't suppose to do repetitive motions with my hand or lift more than 10 lbs, which the mop is. Then she says, "How did you lift the tubs with the food in them?" and I replied, "With one hand." Then she says I can mop with one hand! I was so upset that I raised my voice to her and said, "Not if you want it to look good!" She did it very quickly because she was so upset with me. I get to work this morning and the new schedule for the week is up and she only has me working 8 hours!! How am I suppose to raise my 2 children and support myself in the process on 8 hours a week?! This week I only am scheduled 14 hours! Ever since I got sick with the flu and upper respiratory infection she has dropped my hours and it's only getting worse! I am contemplating going down and applying for unemployment. Maybe then I'll start getting the hours I used to.
 
Through all of this my kids will not stop fighting. It doesn't matter what it's about they are constantly fighting. The oldest one knows better (she's 15). Plus she is extra moody and argumentative the last few days. I had to ask her several times over the past 4 days to take the garbage and recycling out. She is constantly making messes and expecting me to pick it all up. I am tired of being her slave. That is what it feels like.