I was hired years ago at the hospital as an 'evening' per diem. Meaning, I let the scheduler know my availability, I am schedule me the days I am needed, not necessarily all of the days I list. In my initial interview, the nurse manager assured me, in response to my concerns, that almost never would I be required to work later that 1930 (seven thirty p.m. for you non-military time types). I was open about my late evening fatigue and distractedness, a by product of injured muscles and Fibromyalgia.
For the years since my hiring, I am home by 1830, often by 1630 or 1730. Suddenly, after a few nurses took maternity leave or, in one case a leave of absence, in another outright resignation, the per diems have been tapped to fill the gaps. Two of us are suddenly scheduled for late starts (afternoons) and late endings (2200, often). Evenings? Suddenly, that is looking a lot like nights. And, I can tell you, my 50+ year old body doesn't like it. In my younger days, I tried late shifts several times, and never could hack them. Well, that ain't gonna change now.
Additionally, from four day weeks, I have some five day weeks scheduled, against my wishes.
Okay, what to do? I have to look out for myself and my health. So, for the first time, I have become a 'circle the wagons' employee. Use me once, shame on you. Use me again, shame on me. So, I simply put down fewer available days. I would be willing to come in more, but not when I work for a unit that can rearrange my days by six or seven hours without speaking to me or regarding the schedule I have come to expect, based on a precedence of years.
I hate that I have to think like this; to find a way to protect myself, to resort to checks and balances, to end games and punishment. But, as an older and wiser person, I accept that it is what it is, and will look out for me and mine. Another team player goes down in disillusionment...