@jonathan0444 - When you say you're using an eGo-T vape pen set-up...which type are you using? Are you using the true eGo-T that uses an eGo-T battery with a tube or cone shaped atomizer on top of it...with either a foam-filled cartridge or small plastic tank that you refill with eliquid and put on top of the atomizer cylinder? (That type has
no coil that you replace in it.) Or, are you maybe using just an eGo-T battery, but with a tank that you refill and
does have coils you can replace when needed?
Reason I ask is, the original true eGo-T kit
won't work properly with 100% VG eliquid! It's so thick that it doesn't feed/drip down fast enough to the little atomizer burner. You'll get dry, burnt-tasting, harsh hits from it. I wouldn't doubt at all that if that's what
you're using, it's no wonder you're getting headaches and soreness in your lungs.
If it's just an eGo-T battery, with a separate tank that has a replaceable coil in it, then I'd try adding the distilled water % recommended to it, or go with a blend of PG/VG.
No matter which it is though, I'm with others, too, who wonder why you're vaping at all if it's not to quit smoking. If nothing but air has
been going into your lungs, I wouldn't start vaping now.