Welcome to the BCC forum. I am sure other members will soon be along to offer some support.
You could also give our helpline a call for practical information and emotional support. The opening times are 9-5 on weekdays and 10-2 on Saturdays. The number is 0808 800 6000.
You may also find our publication "Mummys lump" helpful when talking to young children. I have attached a link:
Very best wishes