"Would you like to live now or later?"

This is the question I face every time I go to the doctor.  The medications I take are extremely hard on my liver.  I am in my late 20's.  How long can you take pain killers without needing a liver transplant?  Fibromyalgia is for life.  The pain is for life.  I have four small children that take soooo much energy, Fibro or not!  Do I stay on the drugs while they need me the most, then die early, or get a liver transplant later?  Do I stay off the drugs and miss their entire childhood, staying in bed and nursing my symptoms?  Will I  miss their weddings?  Will I ever get to meet my grand-children?  Will my kids grow up saying their mom was never there because she was in bed all the time?  Will they be embarrassed of me because I move like I'm 80 years old?  Will they resent me for the rest of their lives because I missed all of their school activities?  How do you answer any of these questions?  How do you decide if you'd rather live now or later?