How do you tell them?

I am stuck in a weird position. My daughter and I are in a reunion that is up and down and sometimes a little bit sideways. She appears to be indifferent to my life. So here it is - how do you tell them that you might be dying? I tried....it failed miserably and I dont know how to take it. Its like this, I have had issues with high white cell count all my life - no infections, etc. - and the docs have always watched me close. Recently - the last year and a half - I have been severly anemic - the lady that falls asleep on the keyboard! lol - and my white cell count is very high, and platelets, and extremely low iron. So, they are freaking and scaring the stuffing out of me. They are fixing me up with iron - then they will deal with the other...... But, having had a bone marrow test before - ew - I know that the tests will come out positive, just like they did before. So how do I tell her if it is really bad? I know that she is Ms. Tough Guy to protect herself, what if her tough guy crap causes a rift or she does not deal with adoption stuff while I am still around to help? I can't answer questions not asked.....and she never wants to talk about it. What do I do?