Okay so i started vaping about 4 days ago and i am getting this sharp pain in my uppere chest when i inhale after about 3 seconds of inhaling. I switched to 0mg liquid because i thought i might be allergic to nic but its the same. My battery is a lite 40 and i amnt sure what my tank is. The liquid is 50/50 vg pg. Maybe im allergic to pg or something?? I need help i cant inhale longer than about 5 seconds without getting the most uncomfortable pain in my chest