Been vaping exclusively, no tobacco, for 12 days now. For the past 2 days I have had this headache, almost like an isolated migraine in location. It started out day before yesterday just as kind of a nagging irritation, however, it has progressively gotten worse. Today it is horrible. Is this from the PG maybe? If so, will VG clear it up and where can I get some quick as I really dont wanna go back to analogs and cannot go without my nicotine. Please let me know what ya'll think.