Sheila would definitely have been lifted onto the floor from her bed,,because if she was seen to be spluttering caused by blood going down her throat,,then the recovery position is carried out.
Anyone who is lying on their back,choking,,you turn them on their side. It the obvious thing to do.
Her spluttering would have caused further blood to cover her face while lying flat.
Doesn't this make sense to anyone at all.? If you saw someone choking,you'd automatically put them on their side.
The crux of this though,is the fact that Sheila was still alive.Nobody has the cough reflex if they're dead.