Been off analogs for about 2 months.  Lately I have been waking up and have alot of mucus usually clear or a bit yellow and my lungs feel tight and a little weazing.  Also I have a hard time vaping when I wake up, harsh cough but subsides after a few vapes or a few hours after waking up.  This has been happening for the past week or so.  18mg juice various flavor.  Does this sound like a delayed PG allergy?  I have no ill effects during normal hours when I am awake with vaping anything, it is just in the mornings recently I have had issues.