Zero sex drive

Hi ladies, I’m a new SAHM and I know now how exhausting it is. My kids are 16,10 & little baby is 8 months. My SO and me used to do it all the time but now I’m always tired, sleeping has been a challenge, I feel totally unattractive although he frequently tells me that I’m beautiful I just don’t feel it, I know I’ve been depressed but I’m working on it. I just don’t feel like doing it, the little time we get in bed I want to sleep, he doesn’t complain but I know every man has his limits and needs, how can I improve? How can I go back to feel normal again? I don’t even have the energy to try anything related to that! What can I do? Help please