He is taking my baby

So my fiance has cheated before. But I thought we was over it. He has an Instagram I found talking to girls and he won't give me access. all I asked is how many girls. Didn't say I'd leave him or anything. He said he's getting full coustody of our daughter and I want see her. I'm poor hes got a better place then me witch was supposed to be our place once I move in. he's been talking to a lawyer so he planned this while fooling me into thinking we going to be a family. I'm so alone without this baby. I have no family. I'm going to kill myself if he takes her away. I can't do this