It sounds like you just had a big emotional cave-in and that it is going to take a long time to recover. It will take your patience. If you are afraid of remaining in a comfort zone, the comfort zone may be there because you need so much to take care of yourself right now. This withdrawing inward is because you may not have much emotional to give until you have recuperated more emotionally. You need to let others know you need to build your reserves back up again. I think that's a good reason to tell your husband more about this. Maybe he can do something for you. I know you need to recuperate mostly on your own, but he might relieve a little stress if he knows you are so emotionally burned out.

Take care of yourself.