Cigarettes also have toxic, heavy metals. I used to smoke Basics in college, and their slogan is, "Enjoy Basics, with the taste of heavy metals!" I smoked them because they were cheap, but they always tasted like toxic heavy metals to me. I smoked enough of them (along with my roommate) to darken the shades of paint several degrees in our dorm room (although ours was the party dorm room, to be fair, we weren't the only ones smoking in there). So, my cigarettes could permanently stain paint, I'm fairly sure they weren't healthy, I also experienced 0 health related issues as a result.... Not for many, many decades. I mean, it took over 20 years (and by the end I was a 3 ppd smoker) for me to really develop serious enough health issues to switch to vaping.... I'm just saying....
I agree with most folks who are saying it is unlikely that vaping a nickel coil in wattage mode for even a couple of months is going to cause detectable harm, although I think if worried/concerned well, take it up with a doctor. I would imagine most doctors would rule it "inadvisable" but probably not likely to suddenly cause a huge, major health issue, I really am doubtful.
Not unless you go to one of them "naturopaths" or something. Who, in AZ, can be PCPs, like they BILL your health insurance. But I think most rational doctors would rule such an "unconscious" health risk to be minor on the grand scheme of things.
However, I will say again I am not one, but I am a pretty firm believer in the terms "dose dependent" and also, "Here you stand before me, you are alive, feeling a bit sketched out, but sure we can do a chest X-ray if you want" and etc.
I still think a toxicologist would be the person to see. They STUDY that stuff, and if I were in a similar situation, that is probably what I would do. I tend not to freak as much as when I was new to e-cigs, I think it's our media, the whole "thing" that happens when you detox and it just feels weird, I could see freaking myself out about it, although I don't think it's necessary. If I vaped on a nickel coil for a while, I'd probably decide that (unless I had threatening health systems) to wait a bit, before even attempting any serious assessment, unless I felt like I was having breathing issues or something....
Best of luck you guys,
Anna