My husband keeps on threatening to divorce me and take the children

I’m new to this app and seeing all this support you give each other gave me the courage to say this out loud! So I am 22 years old and I have two beautiful children, I got married when I was 18 (I know I was young) but I just loved him so much that I felt like it was such a good idea at the time. So long story short I married him and was pregnant with my first child right away,so I left school and became a full time housewife. I had my first then with time had my second child and was very happy with my life! Well that’s until his parents moved to town and wanted to live with us! So we naturally got a two family house so they can be with each other but still have our privacy (kind of). Ever since we got this house he changed, he became mean and aggressive with me, didn’t want to hear from me, all he wanted was a cooked meal, a clean house and didn’t want me to argue about anything. I felt like a maid for him and his family to take advantage of. every time I would try to stand up for my self all he would say is “ this is my house so you do what your told with out arguing or you could leave” so I naturally told him I’m leaving and he just didn’t care he just threatened me with the kids his exact words were “what kind of judge would give you the kids? You don’t have a house to fall back on, you don’t have a job and you don’t have any money” and at that time all I could do is disagree with him even though I knew it was true, I have very bad credit, I don’t have any money, no house I’m literally nothing!! I don’t know what to do I feel like I’m forced to be with him so I could be with my kids and I’m just not happy. Any suggestions?

Edit: I do have family members but they won’t be helpful or supportive for many reasons 😞