Oh hin, I'm sorry you had such an awful dream. I think it's normal to have these horrid dreams sometimes. We're so anxious and scared that our thoughts and subconscious seem to manifest itself in this way.
I've dreamt on a couple occasions how I had my baby and forgot and didn't feed the baby for a whole day. It scared me crazy but since I've been pregnant, I've had the weirdest dreams ever so I've come to the conclusion that nightmares are a symptom of pregnancy.
And your hubby is hilarious!! Maybe HE had the dream about swimming in a radioactive river.