I am smelling blood, but I am not bleeding
Inflammation of the blood vessels of the nose can often lead the individual to literally smell the blood in their own sinus cavities. This is a common symptom of those who have severe allergies, those suffering from advanced alcoholism and associated broken capillaries in the nose, and heavy users of powdered cocaine.
Phantom smells are symptoms for many many things. Do some research instead of asking this site. Talk to your doctor. Don't accept a "don't worry about it." There is a reason for it. Find it!!
maybe you just dont see it