Hi Maddie
I'm so sorry to hear what you have been going through.
All i can add is to bear in mind that your son was at a difficult setting, the funeral of his father so may not want to talk in that setting. My parents are divorced and i often wonder how i'd feel if my mother came to my fathers funeral and how i would interact. We get on fantasticly but with my fathers family there i would wonder how my mother fits into this now that she is divorced from him. Funny thing is i never think about the other way around, guess it's because my father is so unhealthy compared to my mother.
He may not think you are grieving as much as you are, he may also have other resentments against you that he hasn't dealt with, also with the JW thing and his wife there is that to deal with too. Maybe it's an idea to give him a few days and give him a call.
So sorry for how you feel.
Paul