Could it be the extra 4mg or an allergy?

[kirsty0108]

No-one else has said it so I may as well jump in and add my 2p looks like your a fairly new vaper could just be your body reacting to no tobacco it will settle down fairly quickly or the other old favorite "SOME THING " else sure it will settle down in a few days (disclaimer)

[FirinBlanks]

Kirsty, I much prefer your diagnosis. It's so much cheaper not having to change anything

I've gone back to my old stuff now and all seems reasonably well now.

Seriously, I'd not even thought that my body might at some point be angry with me for taking away something it's had every day for the last 20+ years.