My mother's scent

My mother passed on November 20, 2010 from T-Cell Lymphoma (sezary syndrome). I’ve been dealing with it the best that I can. Back around mother’s day of this year, I would often sit on my couch and pick up a strange scent. At first I thought it was from the couch, or I thought maybe the kids spilled something on the floor. It wasn’t a bad scent, just a really unusual smell. I just couldn’t put my finger on it. I asked my family if they smelled something strange or if it was just me (they said it was just me ). But I could swear that I smelled something. One night it was so pervasive, that I actually went to my vent on the floor to see if the scent was coming from the vent. I was apparently the only one who could smell it.
Earlier this month, I was watching a ghost show on Biography and someone was talking about smelling tobacco smoke whenever this ghost appeared. Then I had an epiphany… the scent that I had been experiencing, must have been my mother! I only smelled the strange scent around Mother’s day. I had been crying and melancholy around that time. And, I would smell the scent whenever I was sitting on the couch, usually alone. Every so often, the smell would return. But, the strange thing is that once I had this epiphany that this could be my mother, the smell ceased, and I have not smelled it since. I’m thinking it was my mother sitting next to me on the couch and comforting me. I still can’t identify the scent. Has anyone else had this experience of a scent?