I would try to find a new doctor that would check and see whether you have some postpartum depression or a combination of lifestyle and postpartum problems? How about the marriage counselor from 5 years ago? Could you call that person and ask for help?

It does not sound like your husband is being very thoughtful or supportive. Do you have any friends of his or male relatives of his (father, brother, etc.) you could sic on him to help him get his act together, see what he's wrecking?