I'm not surprised that he's interacting w/the boys and the dog more than you. You are the first that he disconnected from and, if and when, he does continue his journey, he will then disconnected from them as well. Is there one son that he is closer to now? They generally select one child to remain close to during the crisis.
They do have the attention span of a gnat during the crisis and the knocking may have been disruptive to him. At least he provided you w/an explanation for fussing at your son.
Please take care of yourself. Schedule a nice, hot bubblebath soon.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.