
Quoting
cbg
Let's look at it another way.
It doesn't matter how bad the schedule is or how many people agree it's horrible - she has no legal obligation to change it. She can give you as lousy a schedule as she wants and it's perfectly legal.
You are the one who said it's causing you medical issues and requested a change. THAT IS A REQUEST FOR AN ACCOMMODATION. You are asking her to accommodate your sleeping issues.
That's an HR issue, whether you want it to be or not. You don't think it's necessary to take it to HR? Well, she doesn't think it's necessary to change the schedule unless she's accommodating a medical condition.
Ball's in your court.