Hey Nay, it is possible to have PND. It's a stressful and traumatising time which I reckon will affect you for a while. Could you perhaps book a long appointment with your dr to talk about PND and how you feel? Perhaps even a counselling session to see where the thoughts go? I think if it had happened to us I'd feel awful about it still. It isn't likely your baby's sleep issues are related to the time in hospital - your baby is just being a baby, I think all of us have had problems re sleep and have wondered if we did or didn't do something in the past to make this happen. Maybe a chat with the MCHN would help?