Well come to our forums.
I understand that this would be hard to deal with especially when your children are so young.
Have you thought about speaking to your gp about the depression you are feeling?
While your husband is away try to plan a few things you can do with your children, joining a playgroup or mothers group is great or even a baby sensory class.
Having these things planned are great because they get you out and about and you are also with adults which helps you feel more connected.