I noticed that you said that you did both juices that session... you could have reacted to the PG and thought you reacted to the VG. The 2 things I would do would be... Get an allergy test for both PG and VG see which one turns red and puffy or buy some USP Glycerin from a drug store which does compounding ( most likely an older non franchised place ) Walgreens CVS etc normally dont carry it. Dampen up a wick with the straight Glycerin and take 1very light hit and wait to see if you get the tingles in the mouth throat ( have the benedryl handy just in case) If there is no reaction then you can more than likely rule out the VG as the culprit and start looking into the other aspects of the juice ( flavoring, potential PG additives, alcohol...)