It's nothing, Mary. Sorry I missed this post until now. A little over a year ago I had a CT scan done with contrast. And they didn't even tell me they were gonna do it until about 5 minutes before!
First I drank about a gallon of some lemonadey stuff that wasn't too bad, and then just before the scan they put in an IV line for the contrast. The woman that did mine had the beginnings of Parkinsons. VERY jittery hands. Nice.
You lay down, they do a few scans without the contrast, then they tell you the contrast is going in, and then you can feel a wave of warmth wash through you as the contrast hits the different parts of your body. For me it went head, arms, chest, ass, then legs. Looking back on it, it really wasn't bad, but never having gone through it, I won't lie - it freaks you out a bit.
The nurse said some people report a metallic taste in their mouths, but I didn't.
And about two minutes after the scan is done, the sensation goes away. Easy-peasy.
I think I did an article about this awhile ago - search for it. The odds of reactions/complications are extremely remote, and even if they happen, they are almost always very mild. I'm sure what you're finding are the one-in-a-billion cases.
And while you are very special, Mary? You're not one in a billion special.