I figured out it is an allergy to haus "craft collection" liquids I was vaping. I stopped using the haus craft collection moon milk and it completely went away. Last night I picked up the craft collection voo-dew thinking a different flavor would be okay, and it's the same thing again. So, guess that's it.
I think it's an allergy because my skin started getting itchy all over when I vaped it, too, which is my biggest sign of allergy. Plus I have had inhalation/respiratory allergies before, they were just a bit different than my initial reaction to moon milk, however now when I tried the voo-dew from the same line it is giving me a typical respiratory allergic reaction. Itchy lungs, coughing, have to use an inhaler. I never had an allergy to an eliquid before. i am buying new tanks etc so i don't have any remainder residue from that liquid. No more haus liquids for me.
It's weird though because their website boasts about the quality of their ingredients and they have the typical ingredient profile, must be allergic to a flavor they use.