Erin - I'm so sorry for your loss and that none of the family is supportive. I'm glad that you are going to al-anon. As you can see, sadly, you are not alone. For me it wasn't my spouse, but my stepmother. I found her early enough to attempt CPR, too late for it to do any good.
I do hope you continue to read and post here as we do care and we are here for you.
Hugs and prayers,
Amy