I see the struggle you are in

You love being a Nurse and it is part of your beauty and being. You job has you stressed to the point your health is being harmed and that is probably something you
really really need to look at and see it for what it is. Hell none of us want to admit we just can't work like we once could whether its a mental illness or physical illness.. Pride is a huge roadblock to climb over.
You and only you can decide what you can and can't handle..
Be kind to yourself