S.T.
I would call the dr and they may suggest he come in to make sure it's not broken and because you don't know for sure you would want to have it checked and that way you're not so nervous and uptight. If you ware so he will be too. so, it's probably best to have it checked and i don't what they can do about it but to relieve some anxiety on your part and on his too.
That is my thought on this.