Have you thought of going to a sleep disorder clinic? Your husband could have something related to his medication or narcolepsy. Have you both had complete physicals to rule out any physical ailments? It's hard to tell whether depression is causing your sleep disorder or your sleep disorder is causing your depression. However, I don't think that sleeping that much and not feeling refreshed is normal. Also, have you spoken to the doctor prescribing the medications about this? These are serious secondary effects, if they are related to meds.

About having kids ... I think you can wait on this decision. I would take the time to figure out my health problems first. It's worth it.