Dignit, sorry to hear of your plight, yes talking about it does help. I know you probably have had many sleepless nights with many more to come and I know this is easier said than done but one thing I have learnt is you cannot change things with worry, you can only cross a bridge when you get to it to it, not before.
Surround your self and your wife with family and friends, seek support, don't be stubborn or too proud to accept help, have a beer with a mate and talk. Financially, go to Centrelink and talk to their Financial Support Officer and find out what assistance you may be entitled to and get the ball rolling early. Looking at your post you look to be about my vintage 57-58 so you should just about be able to access your super if you decide to retire early.
If you'd like to talk, send me a pm with your number and I'll give you a call. Our thoughts go out to your wife, yourself and family.