So the nurse took some blood from you for checks and did use some extra sheet to keep the blood off the bed clothes and neither replaced your sheet within ... let's say 3 days? Ouch.
I suspect that at least one of the nurses has changed due to the shift assignments. So someone must have registered the blood spots who didn't know. Incredible.
How many patients and how many nurses?
Are you about to write to a newspaper about lack of nurses and care in the hospital yet? seriously asked