Hi Pantss..I have gone through the same thing u have....and before i could ask, i saw u have also answered what i was expecting....it's the change in PV that caused this...believe me, i am on my fourth month now, started of with a cig-a like, then to the 510-manuals with LR boge cartos and have recently shifted to the ego-t tank attys with twists...and for the first couple of days i went through dizziness, nausea , and stomach ache, the reason i figured out was , i was vaping way too much liquid than i used too, almost 3 times more than i used in my 510 and boge cartos....i slowly reduced my vape time, and things are in control.....
Happy vaping
Happy vaping