I'm not sure about a "crawling" sensation; I know a lot of people with hypothyroidism/Hashimoto's have a choking sensation. That often comes from having a swollen/inflamed thyroid. I've had that quite often myself, when I've had a flare from Hashimoto's.
Can you describe the crawling sensation more fully, please? Do you mean it feels like something is crawling on your skin? Like bugs or something?
Do you have Hashimoto's? Have any of your ultrasounds ever indicated a goiter?
I just discovered this thread, but you were asking for people with similar experience so here's mine:
When I was under a lot of anxiety, and also being diagnosed with Hashimoto's, multinodular goiter, and eventually thyroid cancer, I would periodically have a sensation of water running down the front of my neck. I would go to wipe it, and it would be completely dry. I googled it, decided it was not something I needed to worry about since there was a lot of other stuff going on at the time. It probably only happened 3 or 4 times, but was a very, very weird sensation.
I just googled anxiety and choking sensation (I have/had a lot of anxiety this year), and it can be an anxiety symptom, and the only time I experienced the weird skin sensation (mine was not a crawling, but I think it's a similar situation since there is no explanation for it) was when I was very anxious.
I had multinodular goiter from chronic untreated Hashimoto's (diagnosed this year), and I have avoided anything touching my neck for decades, starting when I was in my late teens/early twenties, I stopped wearing turtleneck and eventually scarves. I am with you on V-necks, I wear some crew cut now, but end up stretching out the collar if it is not loose enough. I also have not worn a necklace in probably more than 10 years. I wear scarves now because I had my thyroid removed and now have a scar I like to cover, but it's still weird to have something touching my neck. I believe my goiter and my swollen lymph nodes from Hashi's led to my neck being really sensitive all the time, but I don't think it's uncommon to not want things touching your neck even if you don't have those issues (I told my aunt about my avoidance of neck touching before I had a definite diagnosis, and she said "lots of people don't like things touching their neck").
Anyway - I'm so sorry you're dealing with this and can't find out what's wrong. I just wanted to let you know that you are not the only one out there with weird unexplainable neck sensations.