JT,
I am so sorry. You were just comforting me in the loss of my brother in law and now you have to go through basically the same thing my sister did. I would want to scream too. Find you a private place and do just that. I have done it before and it helps. How old is your husband? This may sound cruel but if there is to be no cure, pray for a quick passing. Mama suffered so long it was a relief to see her not in pain any more.
We just got back from my brother in law's wake. My sister is doing ok for right now. Tomorrow is when it will be the worst. Please keep me posted on your husband.