Hello. I am new here but I have been an e smoker for about two months. I am using the 510 with medium strength (11mg) juice and it's been smooth Sailing. But recently I started having terrible headaches. I know this is e cig related and has nothing to do with analogs. I can go a whole day just fine. But as soon as I take a couple puffs my head starts to pound. Feels like a sinus headache. Also recently the e cig has made my lungs feel weird. I actually quit e cigs because of these feelings. Could I be having a reaction to the pg? If I am then why is it happning months after I started.