The poor little tike! I would have suggested the dr or hospital first off, or I would ring the Nurse on call (1300 60 60 24) and talk to them about it. I have found them to be very useful, although do be prepared for the question at the end; "What would you have done if you didn't call us?" (they always seem to ask it).

I am sorry, other than that, I don't know what to do. Good luck, hope its nothing.