I recently started a new job as a nurses aid in a long term care facility. They claim they told me when they hired me that I was on a probationary period but I don't remember that. Anyway, after one month on the job, my supervisor told me she did not think it would work out and that they were letting me go. Is that legal in Massachusetts? I did not have a contract of any kind, but don't they need to give some kind of reason?