Well, she used to go to doctors a lot, and nothing really helped, but now she can't even really leave home and doctor's visit home is so expensive, as would be calling taxi and all that jazz of getting her to doctor which would still put lot of stress on her heart, back and more.
Still, she always comforts me that she lived to 60 with this issue, well over what doctors told her she would get, so she still has some time left for her. And saying how much time is left is hard, so I wouldn't cycle in on that.
I am sorry you have the same issues. But it's different for every person, the level of strength and all that. So.

And you're still young. :) I will hope and wish you all the best.