Hugs. So sorry you are going through this. If you can't return the rest of the fish, have someone else do it for you. They must go back. I think the ER's are always cold because the nurses and doctors have to move around so much that it gets hot for them. However, they don't think of the sick people who are laying in the beds freezing so they can remain comfortable. They should have provided another blanket.
Hugs again. (Soft hugs, I don't want to squeeze you too hard-don't want the consequences)