I am sorry to see you are having a rough couple of days. I know it is hard when your family is away for so long (see, you should have come to FL!).
The current title of your thread seems appropriate, because I am sure it was not the angel that told you to ask your W why she has your son call you. I am sure that I don't have to tell you that asking that question only made your W feel more frustrated and caused the distance between you to be greater. This is also a part of giving her space. Even though she is 4+ hours away, she still needed the space of not calling you from the car. I know that this hurts you, but this is just the way it has to be right now. You have to give her the space she needs if you want there to be a chance to save your M.
I understand the frustration that you have with all of this right now, but you need to figure out a way to pull yourself out of it. Focus on you and on doing activities that make you happy. This is a perfect time to do that w/ your family out of town. What activities would you get excited about and help get your mind off your sitch?
The next phone call to your family needs to be from the high PMA CVA, who is pumped up about the things he is doing for himself. Your family also needs to come home to this CVA w/ a good PMA.
On another note, I know it is easy to be concerned about if you would ever find someone else in the event of your M ending. But really, that is not something you need to be concerned about right now because you are still married. You are on this site to save your M. So, don't worry about who you might date if your M ends. That stuff will work itself out when and if it ever needs to.