Re: Anyone crashed after dental work?
I had really bad fibro pain flares (& my fibro pain seems related to my thyroid function) for yrs. after my perio cleanings until I figured out that the "desensitizing gel" they used is 4% fluoride, and the prophy paste ('polish') is also quite high in fluoride. When I eliminated those chemicals, I had no problems following the cleanings. I've found dental staff to be quite helpful & accommodating to my requests.
Fluoride is a known thyroid depressant, works on many levels. In times past, before the newer drugs to block thyroid, fluroide compounds were the meds of choice for runaway Graves disease/hyperT.
So, I wouldn't be surprised if perhaps something you encountered that day was high in fluoride, and caused problems.
Hopefully you'll recover in a few days' time, but for future reference, you can call the dental clinic next week & find out the names of the products used & the amt or concentration of fluoride.