Not allowing me to enter matrimonial house

I was married in 2019, my father in law has a lot of interference in the house and in my relationship. He controls my husband like a 8 year old boy and unfortunately my husband follows him and leaves me behind. I was pregnant in 2020 and during pregnancy I stayed at my parents house, because they were not understanding my needs and situation. I needed rest and proper attention, when I delivered baby in Nov 2020. I tried coming back, but my father in law is not allowing. Everytime giving some or other reason. Now my baby will be 5 months, I have tried enough, but he is saying change your behaviour otherwise stay in your house. He want to control me too. My husband follows his father blindly, he is not helping. What should be my steps further? I wanted to fix it without legal involvement but now it is getting dragged too much. I am working and currently on Maternity Leaves. I am doing all the baby expenses myself and my family and me is looking after the baby. But this can't be continued for long.