It may be your astral sense that caught up the smell. Which explains no one else senses it.
The Gods in other hand, do not give off bad or awful smells. They are glorious and clean beings.
Like I for one, I got the taste of blood many times, because of my bioelectricity increased, it started to clean and heal my blood/organs, and sensed the taste of blood as a sign/result.
It may be an identity that is trying to contact you, but as it gives a bad smell, I would ignore it. And not let the identity in. And do aura of protection, and ask Father Satan what it may be and you may recieve some signs.
HAIL FATHER SATAN!!!