This must be hard. I just saw a video on Youtube.com that may help you see that trying to stop your daughter
from her way to treating you is not going to help. She has a deep emotional reason (not consciously) that has to be addresses. She is crying for help in a way of which she has no control. Your sickness maybe scaring her. She fears losing you and then her behavior gets frustrated response which hurts even more.

Here is the link to the video:
http://www.youtube.com/watch?v=JooO_c3tBs4

Thanks, i will have a look at it. Your response makes sense to me as she is usually so good. I think that maybe counselling might help too.
This is the first time i have ever consulted a forum and it helps me take the next step forward and seek professional advice. Thanks again.