Electric Shock..Help?

Today I was fixing a camera which did not have batteries in it. However, I touched the copper on the camera and an electric current went through my thumbs and out through my tongue. (Like an idiot I had a metal hair thingy in my mouth) I am aware the that even with batteries the voltage would have only been 9V, however, I am worried because I could literally feel the shock go through my body, this went on for about 30 seconds until the metal hair thing dropper from my mouth. I have white charred looking blisters (it looks as if I had a blister and I tried to burn it off and then washed off any black). My husbands an electrician and he says I will be fine. As much as I want to find this reassuring I can't help but worry. Anybody ever experience anything like this? Any advice would be helpful.