Hello again Jayne.
I think your husband has now joined ?
It's good that he is positive about the whole thing and it is also understandable that your world is no longer the same as it was before the diagnosis. We all know that feeling.
You'll get through this, you have to because your soul mate will need you to be there and to be as reassuring as possible after the op, not to mention your son.
At the moment the fear is taking over but there are many on her who can tell you that there is life after diagnosis. It isn't the same as before but it is life. He'll be around to watch your son grow into a fine young man.
Please don't let this fear take hold. You have the help of your GP and that is good but it might be good for you to also take a big breath and let that fear out. Paul is facing a major operation and I am sure both you and your son will want to be as strong for him as he is being for you.
Good luck and God Bless