Hello, I have been vaping for about 2 or 3 months and since yesterday I'm having sinus headache, not sure if it is related to vaping, so far I have only vaped PG (dark chocolate for JC and Menthol from TW). The thing is that I (almost) always exhale the vapor through my nose, has anyone experienced something like this? From what I have read, vaping should relieve sinus right?? ... right? but PG or VG? does it matters? should I exhale thru my mouth instead of my nose? comments? help!