to cancell or not to cancel

I am an agency who works for one of the largest hospital systems in my state. I have a two day a wwek contract with them. it is almost up however i am torn on what to do. the last few weeks the manager has been a down right ***** to me. made me so late on morning that i lost my hotel room. i had to work with her tongiht and this is a step down unit and she was angry when i refused to take 12 patients. then had a fit when i announced that I was taking a break and leaving the floor. i am entitled to another break but i am not taking it becuase i am afraid of what will come out of my mouth if she gives me **** about my break. it s definatly a hostile work enviroment. I take excellent care of my patients but 36 an hour is not worth this. I only have like 4 days left to work on my contract but she keeps putting me on days i have told her i can not work and i am going to have to call in on one of those days. after the treatment tongith and the unsafe enviroment. Should I cancel my contract or stick it out.