Your baby will be fine unless it winded you and practically knocked you out but not highly likely considering it was key key chain .
I fell down the stairs . . . that would hurt a baby. (baby was fine). A hard, direct punch to the stomach, THAT could hurt a baby A swinging key chain, really, I don't think so, If you have bleeding, call your doctor but would be REALLY surprised if you did. good luck
A key chain can't hurt your baby. Baby is well insulated. I have to tell you that the term retard is not used much anymore as it is kind of not nice. Parents of down syndrome kids have let others know how the overuse of this word to describe stupidity has made the word obsolete in terms of talking about downs syndrome kids and it has become politically incorrect. I just thought I'd mention that in case you didn't know as I'm sure you would never want to offend someone with the use of that word. good luck