Hi AAAA
I have not read all the responses to your thread, but one thing stuck out for me. I wonder if it is not so much the pain and consequent mood swings that anger you at the core, but more his unwillingness to act when he had the chance. And now not only he lives with the consequences of the delay, but your whole family.
I live with chronic pain(the cause took many years to be dx) and I suspect that one of the reasons that my fiance and I are still together through all the grief and trauma, is that I work very hard to get better. I mean, I overdo it sometimes (due to my type A personality and frustration

) and my man gets angry with me, but I go to my osteopath and get scans and now I am going to a pain management doctor. I do try my best to be "proactive".
It is not easy. I am angry ALL the time and spend much energy in trying to control my moods, so I don't take it out on others. I feel hopeless and burdensome. I feel useless and cranky and obstinate. VERY obstinate.....
All I know, is that pain has changed me in to something I do not recognise. Maybe you guys need to sit down with someone who can help you ALL manage the pain and talk about the loss and depression that can be associated with it.
I really feel for both of you. I hope it can be worked out.
Take care,
Michah