Depression

I'm 33 weeks and I suffered with postpartum depression with my last child up until around 8 months postpartum. We got pregnant around 10 months postpartum and I felt better and like myself again until recently. I recently made the switch to become a stay at home mom which I am so grateful to be able to do, but it feels like I'm falling into a pit of depression. My fiancé works 7 days a week and is gone for at least 14 hours a day. I understand he is tired from work and I don't expect much from him but finding the energy to clean our house by myself has become so challenging. Does anyone have any advice?