erm....can describe in more details what problems are you facing now?
mother in law...what has she done to you? Nagging and disapproval? She actually volunteered to help you look after?
looking after babies are never easy ....but it doesnt help to detest your mother in law also isn't it? I think you may be too tied down with the chores and demands of a newborn....are you too stressed? Any way that you can relax one two hours of the day while you put baby with someone~~~
tats all i can suggest for now....till you have some more descriptions to let off steam...