You’re wife is pregnant. She isn’t showing any interest in cleaning the house. Maybe ask her why.
Either she will explain to you that she physically feels lousy, fatigued, lethargic etc.
Or she will explain to you that she is mildly depressed.
I understand that you don’t feel that your marriage at this point is 50/50. It usually isn’t. Marriage is 90/90 (alter Novominsker Rebbetzin). When everybody gives 90% of what they have, then it’s a successful marriage. Give in, give in and give in. There will be a time that you will receive more than you deserve as well.