I agree with misty, except for the wallowing in misery part. ouch.

It's always going to be difficult for people whose babies have died or are having fertility issues. It's great you're sensitive enough to be aware of that and not rub their noses in it.

It's your baby and you're allowed to be excited. Just accept some people can't be excited for you and don't take it personally. WRT the couple whose baby died, all you can ever say is "I'm sorry for your loss." If you're interested and they seem willing, ask about their baby, especially the baby's name. It always always helps and you cannot make them sad by doing that. Though sometimes they won't want to talk and it's ok if you'd rather not as well.

You can only be you. Take care of yourself and bub and enjoy being pregnant and anticipating bub.