As to the advice on staying calm, I welcome any and ALL advice on that front.
Any and all? Excellent. Get to a health food store and buy some Rescue Remedy. Spritz it in your mouth. Then go do something else. Then check in with your mind later, see if anything has helped. It's a mixture of "flower essences" created by a guy named Bach (not THE Bach, just A Bach, LOL) and it's the miracle "drug" in our household. Calms a husband having blood sugar freakouts (he's considered type 2 so there's nothing much to be done but wait if he goes too high, though that's rare, and even though he never really plummets, if he hasn't eaten in awhile he gets VERY difficult), calms me when I'm anxious about, oh, just about anything (my whole school career, from 4 years old in Montessori to 25 graduating from chiropractic school, I woke up nervous with a nauseated stomach, and in HS I would come home every day with hives on my chest and neck from the nervousness and social interaction (with people I'd known for years) all day). Calms my son and has done so since he was 2. Calmed our fraidy cat when we put a drop in her water for the 4th of July.
You did ask for it all!
It's not a true homeopathic, but there are homeopathics that have effects on thoughts...might be worth checking out...
When it's really bad, make your body (or upper half, anyway) go as limp as possible.
I like it. Something I learned in therapy (anger management in my 20s) was to drop your jaw and put the tip of your tongue on the roof of your mouth just behind the back of your upper teeth. And breathe. For me, it alleviates irrational anger, but it also calms me the heck down. it's like it's impossible to feel stress when you have your mouth like that. You're not going to look brilliant at that moment, but that's not the point. The point is to get calmer.
Currently with the mole situation, it's obviously there for everyone to see. It has changed, and it's obviously different from the others. So what else could it mean?
Most of the ones I've read about that were normal, were just a little odd, but most of the ones that changed always seemed to be something sinister.
Well, no one writes about those, do they? So along with the others, here...my mom had tons of moles removed from her, and some from me and my brother when we were kids and teens, *because they had changed*. Not a one was problematic. I had my "beauty mark" mole removed, sadly, at 35 b/c it changed. Not a mole on my face, but on my shoulder; for some reason I just loved that thing. Loved wearing off-shoulder shirts/dresses so it would sit there, looking alluring. Until it stopped looking alluring. Got longer and droopy, kinda icky. And my son would tug on it as he nursed, which was one of the most annoying things in the world to me (hurt, too). So along with some skin tags (thank you, hormones), I had it lopped off. Absolutely NO problems with any of them.
So listen...changes in moles is
a sign of a problem. It's why dermatologists like us to pay attention. But that doesn't mean that ALL changes go along with a problem. Just like all coughs don't mean TB, all mole-changes don't mean The Worst. Skin changes over time, things that were firm (like moles, what were you thinking? lol) get droopy, things that were well defined go beyond their borders, and so on.

Don't borrow trouble.

Breathe in and out, be there for and with your family, smile, spritz some Rescue Remedy, go to your appt, continue to breathe......