Nursing Travel Agencies

I travel with this company for patient care, work three days and I decided dissatisifed with the system. (Do not get all the details). The agent said that I wanted to terminate the contract. Everything I have been a test for the days I work, and the case in three days I was working scholarship. I had no advances or bonuses. The contract does not say where the sentence to end early. You try to tell me that I can "cost problems, I am responsible and" get back to me tomorrow. "If the contract is not, and I have nothing true but what I should I be OK? I'm really stressed. Someone enlighten us?