I'm so very sorry for your loss. Maybe if you could say all of this to your husband he may understand more of how you feel. Sometimes it is easier to talk to "strangers" and let your emotions come through rather than the person who is closest to you. I can feel your pain and I understand what it like to lose a wonderful pet, it is truly a horrible thing to go thru. Sit him down and help him to understand what you are dealing with, it may be just what he needs to understand why you are wanting another little baby.
hugs and good luck to you.