You write very beautifully about you and your husband as your husband approaches his death. From what you say of your husband, he does not strike me as the type who is hell bound. Anyway, I prefer to believe what St Francis of Assisi said. “All souls will be saved”.
I know when I die that I would want to be conscious and alert of everything. I guess that is what your husband is trying to do. If he can handle it, more power to him. I hope I can do it too.
I hope you find a way to give your husband some peace. Calling the chaplain in is a good idea.
My wife and I have been legally separated for 4 years. We never divorced. My cancer brought us closer together. We are talking about me moving back in with her. Your husband is blessed to have you there for him. Hang in there and keep writing.
I am not a churched person, but I believe in the power of prayer. I pray that you and your husband will be blessed in your final time together and that your husband’s pain will abate and that he will have a peaceful death.
Don M