I had a sneaky suspicion you were up to something daisy as you had not posted. Congratulations! I am so glad your little boy has arrived safely, although what an ordeal for you. As others have said though, all that matters is he and you are safe. Do take care though, you have been through an operation, and sometimes people forget this, so really need to be kind to yourself during your recovery. 
Thank you all for your sound advice and clear compassion for my little girl. Her leg is bruised and grazed this morning, but better than I thought it would be. She says she is angry with the boy, and is frightened of him, but was happy to go to school as she has good friends, and trusts her teacher.
Thank you in particular for Stunt sharing about your boy. I am painfully aware that there is another mummy and daddy with their precious son involved in all this. I do not know what his particular difficulties are, but I am guessing Aspergers and ADHD from what I have observed. My beloved brother has Aspergers, only diagnosed last year at age 47, and it has been fascinating and quite distressing hearing how he has seen life. He was just my big bro, and still is, but it shows what a brave strong man he has been to cope with what he has.
I have been emailing the Head at each turn, so have a clear record of communication. I have faith in the Head as my work involves a lot of child protection, and have heard excellent things about her. I will mention about the violence at home. I was concerned about confidentiality, but I also need to realise that sharing this is actually possibly a good thing for the family. I trust the Head to deal with this information appropriately.
tits I am worrying about you. Please get yourself looked at. My concern is it may be Pre-eclampsia, not that I am an expert, just a concerned virtual friend x