@debrat1 You know the old saying "we can only do what we can do." You can explain to your family the situation and the symptoms that you see now and the possibility of additional things in the future. You can encourage them to accept it and to help you as you go through this journey, as they will certainly go along with you. But you can't force them; we can't force anybody. We can only offer them the information and the tools. What they choose to do with it becomes their decision.
I find this discussion so interesting. My husband's health after his kidney transplant three years ago is much better than mine is at this time. My issues are all autoimmune related. I know the distinct possibilities for the future and each day I I'm grateful to be here and have the health that I have for that day. My husband looks through rose-colored glasses and figures "we'll deal with it as it comes up". I want to consider the possibilities beforehand, and be prepared.