Hi Sandra,
Welcome to Mumstown!!
You can try daft.ie or myhome.ie or even go to the local supermarkets, town halls and churches near to where you want to find a place to live and put up a post to see if anyone has a house suitable for you to share.
There are local letting agents around the Bray area that can help you to.
I hope you get sorted before your son comes, best of luck and if you feel like having a chat, come on here and type away to your hearts content!
Best of luck and happy chatting,
Best wishes. x