I've been suffering with a lot of anxiety on and off for the past year so it could be that maybe. When I was using 3MG juice it was with sub-OHM coil and taking big ... lung hits. I vaped pretty heavily for an entire year on my first mod with 12MG 50/50 with no ill effects and ever since the anxiety and panic attacks started last year, a lot of times vaping just hasn't sat well with me and makes me feel weird afterwards. Maybe I should just limit myself to vaping when I drink. I was just curious to see if this happens to anyone else. I must be a special case.
Are you personally worried about vaping, or overthinking about it? I understand anxiety as I have it myself, we all do to some extent but I can honestly say vaping does not cause this effect in me.
I can use 6mg on a subohm dual coil and do a 10 or so puffs and be fine, everyone is different though!
Are you sure you have been hydrated? That really is the case with a lot of things, as a people we drink juice, way too much soda, and other things but not much pure good ol' water, I'm guilty of it myself. A good way to know if you're hydrated is by how much you're urinating a day (clear 7+ a day, throughout the day) or by pinching the back of your hand and if your skin has no elasticity.. you're dehydrated.
What about headaches or nausea, do you have either of those symptoms?
My advice would be if while you know you are fully hydrated and still feel these ill effects of vaping, you should go to a doctor for a more educated opinion. I surely hope that you can continue vaping!