Rose76 is so wise, and she gives you good advice. I myself, an American liberated woman, suffered for 20 years with an overbearing mother-in-law, however, she didn't live with us. I wouldn't have lasted a month under those circumstances.
I realize the family structure and cultural traditions are different in your location, but is there any hope of you moving out and living on your own...you and your husband and your baby?
Is there any chance you could relocate to the USA? It would be so refreshing here for you.