M.,
Did the two of you talk through each other's expectations of howlife would change when your baby came before you gave birth? That may be where the problem is beginning. A lot of men have this picture in their minds of a Donna Reed kind of existence during the time you are home, but don't realize the challenges of the real thing.
It sounds like you are home very temporarily, during your maternity leave. So we're talking about like 3 months or so, right? During which you are recovering either from pushing a human being out of your body or major surgery, depending on your delivery. Either of those things take time to get back on your feet and feel like a person again. In addition, you are learning to parent for the first time, probably not getting more than two or so hours of sleep at a time. There's a huge difference between four two hour naps and an eight hour night's sleep. It absolutely affects your energy level. Added to all of that is the constant needs of a newborn, to eat every two to three hours, trying to adjust to breastfeeding if you are doing so, meeting diapering and changing and soothing needs which are huge in the first three months, extra laundry, etc. If you are not getting to polishing the silver, it's totally understandable!
Does your husband truly know what goes on during the day?
Was your husband a supportive and loving person to you before your baby came along? If he wasn't, then this is just a new reason to be critical and belittling, and no one needs to live with that. If he was a genuinely good man and a loving husband, then this may be an adjustment issue for him.
I know my husband was scared to death when we had our son, because with me as a stay-at-home Mom, he was wholly responsible for finances, and that worried him. All he could see for the first little while how huge that responsibility felt, and how dire the consequences seemed if he were to fail in his role. It was hard for him to see past his own fears and worries to the facxt that while my responsibilitiesweren't the same, they were nothing to be blown off, either. He's a good man, and a great husband and father, so he camearound after he realized we were going to get the bills paid every month, and no one was going to be living in cardboard boxes that said my Dad's a bum on them.
If your husband is acting generally out of character for his normal self, sit down and really talk to him. Talk about how he's feeling, and about how both lives have changed since the baby came. Remind him that what you are doing is important, and that the financial burden on his shoulders will be shared again very soon.
If this is typical behavior for him, then you amy need to seriously consider your relationship. Not only do you not deserve to be treated that way, your baby doesn't deserve to grow up with someone in their life who is critical and negative.
I wish you luck either way, and a huge congratulations on your new little miracle!