I think it sounds like you and H simply experienced some normal emotions from being tired and edgy. I think we are still entitled to those occasionally!
You made a wonderful list. If we stop and think about all of the things we have in our lives, all of the positives, we should indeed be thankful.
As to how to be more thankful, I don't know. Maybe we just need to remind ourselves everyday of at least one blessing in our life. That would take us through many weeks!