Just offered Nervital from Healthy Living did I make a mistake?

No, because there is a money back guarantee, though it may be a struggle to get.
https://onpattison.com/news/2025/dec/18/nervital-reviews-2026-ingredients-pricing-nerve-support/
I'm unfamiliar with the product but have heard that you can experience unpleasant side effects.
I hope it works for you. Let us know.