Just a quick update here - will be back later for personals - thanks for the advice ladies.
Well Izzy woke up with a little poo in her her nappy this morning after an 11 hours sleep and I just changed her now and she had done a big poo - all normal runnyish poos - no hard bits or pebbles.... so shes not constipated. She IS still making straining and grunting sounds like she is pushing something out and I wonder if she made that noise one day and has decided it sounds pretty cool so she does it all the time now! She isnt terribly upset or cranky so Im at a bit of a loss.
Gotta go - will be back later ladies!