my sussex has been laying for a month now but she only lays irregularly. She hasn't laid an egg for 4 days now but is still going to the nest as though she has to. She will sit on it for an hour or 2 in the morning and then again in the evening. She doesn't appear to be in any discomfort but I am concerned for her. Most of the eggs she has laid in the passed have been double yolks and some of them have been really very large - 84g...... Should I be worried for her?