Need help

Me and my partner used to spend all the time in the world together even while I was pregnant and then since he's been born, he doesn't want to do anything with me, he doesn't seem to want to do anything as a family and spends most of the day asleep then most of night awake, I'm 18 weeks pregnant with our second child and I do everything for us, meaning I tidy, clean, cook and feed all three of us.... Am I going crazy for is it really unfair for me and the babies?