You are assuming, you don't know. Ask her what her Ideal H would be. You might be pleasantly surprised, you might be slam dunked and know that there is no reason to 'try' anymore. While you're talking remember to have the conversation about your biopsy too.
What I am saying Jeff, start communicating your needs. Start small, like a ride to the hospital please and thank you. If you haven't talked in years how does she know what YOU want? Is she as frustrated as you?
Live your life while you are still living. Riding the trail less traveled.