Ok, well I'm really freaking out now. I am constantly smelling smoke, as of this afternoon. I've had this before, but nowhere near as strong as right now. This website below describes smoke smell that lasts a under a few minutes is usually neurological - meaning seizures, tumors, ect. And smelling smoke that lasts a few hours to days is usually from olfactory nerve damage (which is the first thing that happens with a brain eating amoeba). Freaking out!!!!