I think you have already answered the why : between the phone call not returned, and having session with your husband, it would be totally normal for you to feel fragile and emotional.

Do you feel as though something has been taken away from you because of these factors?

I am not sure, but you seem like someone who likes to keep her emotions in check-- and it sounds as if this week, it might be a little harder than normal to do that-- so perhaps you would rather avoid the trigger than have to deal with the intensity of emotion. I don't blame you for feeling this way!

I really encourage you to attend the session. However, you need to get that T of yours to make room for an individual one, also! There is a lot of stuff going on for you now that you need to take care of between you and him. Time for you.