I would definitely recommend letters just like it has been said. Letters are amazing even if you don't actually give them to you husband. They give you a chance to get all your feelings out. They don't have to make sense, be grammatically correct, or even flow normally. Just start writing and it will amaze you what will come out and how much clarity you gain by writing. I often write letters just to figure out how I really feel about things.
I also find it really helpful to write letters to each other in tender or hurtful situations. The letters don't talk back, you can finish your thoughts without interruptions. Then each spouse has the time to read, reflect and respond to the feelings in the letter.
I wish you the best and hope that you will be comforted in this difficult time.