Not myself

I just don't feel like myself anymore. I'm always tired and just bummed out feeling. My husband works a ton and I live away from my family I have no one I spend all my time at home 90% of the time alone with our baby. My husband is constantly asking me what's wrong and I just don't know what to tell him because there's nothing "wrong" I just don't feel right. I don't know what's wrong with me... It doesn't help that he complains about the house being dirty when all I do is clean and take care of our child. I just don't know what to do. I'm tired of feeling like this, I feel like nothing. Nothing at all I'm just here