Sorry you have a head cold and will not be able to appreciate your samples. I'm sure in time it will clear up and you will be back to sampling.
I don't know anyway to improve your sense of smell but if you go to the fragrantica website on the reviews section you can get a breakdown of notes of almost any frag. You can use this to train yourself to detect certain notes in a frag that you have by smelling it then checking the notes. In time you will be able to detect bergamont, tobacco, amber etc in scents.
Get well soon!