I feel like a bad wife/mother

I’m 21 weeks pregnant with an 18 month old. My husband works and I stay at home. He’s been getting off at 12 everyday for Christmas but I found it makes me lazier. Since I know he will be home so I can just lay on the couch until he comes home. I hate it. I have so much to do but yet I am just so drained. I play with my son and feed him and change him and stuff but I just feel bad for not cleaning or cooking. I wish I had the energy and motivation to stay on top of things but at the moment I don’t. I just want to crawl into bed and stay there all day. I sleep a good 8-9 hours a night and yet I’m still exhausted. I know it’s not physical exhaustion it’s mental exhaustion. But idk how to fight It. Any tips would be greatly appreciated. I mean it’s 12 and I still haven’t put a bra on or left the couch 🤦🏼‍♀️