Um, I'm no egg candling genius, but I would just wait. It could be just an anomaly in the albumen. Are the air cells in the right spot (fat end?) You usually don't see anything significant until like day 6 or so.Those are pictures of the weird egg. I hope the pictures show up I'm not sure if I'm doing this right.
Have you kept tabs on the temperature? I hate to be a whatever, whatever, but if you can, I would try to see if you could raise it by another 1/2 degree or so.