try to explain your husband that although he had four kids already for you it is the first time and everything is completely new!
I think it is normal to be more worried with the first one and it would be good if he could understand this.
(I was/am like this!)
if you just miss the visual aspect of it, it might be good to get a baby listener, which you can put on your belly whenever you want to hear the heart of the baby
but don't get depressed.
I think everbody get times throughout pregnancy where you get imaptient and want to see/feel something or you just get fed up with being pregnant!
I had times like this as well
