Its been almost 3 months since I had LO and the house is a mess!

I am always to tired to clean it, too tired to do anything other than care for LO. When Aidan sleeps, I sleep (night and day) Its like I just can't bring myself to have the energy to do anything?! Its really annoying that I will WANT to do stuff, and then just don't have the energy/too tired to do it! I'm on anti depressants for Postpartum depression, could that have anything to do with it? What can I do because surely something needs to be done.