Husband got another woman pregnant while I'm pregnant too!

I need some major advice....

I had to get an order of protection against my husband in may because he refused to let me leave the house on multiple occasions, held me against my will, pushed me, kicked in doors of our house and garage to get to me while I was hiding from him during fights, held me down on the floor and threatened to take our children from me and erase me from their memory and took my glasses off my face a broke them..... well a week after I got the emergency order of protection I found out that we are pregnant again..... this is our 5th baby together (they will all be 28 months and under when this baby comes)..... well I told him about the pregnancy and he said he knew the exact day we got pregnant..... but after a few months he started denying our baby.....

Well we have been talking almost daily still since I got the order and for months I had been asking him to forgive me for getting him taken out of our house and I had begged him to try to save our relationship and our family.....

He has been living in another state about 12 hours away without stops.....

I'm now almost 32 weeks pregnant and I found out on Saturday that he got a woman that we had been fighting about pregnant.....

I saw a post on Facebook that she was pregnant so i asked if it was his and he said yes....and he won't tell me when she is due just that it is his.... she's far along enough that she is finding out the gender in 4 weeks....

He is blaming this all on me and that its my fault that she is pregnant because I got the order of protection and that if I had not gotten it that he would still be here and wouldn't even have been around her....

But obviously I wasn't the one that cheated and had sex with someone else with out a condom and came inside her....

The order of protection is good until may 2020 which is not a permanent thing and this baby is....

I can't stop crying and I'm heartbroken....

I know I will never be able to forgive him and that I will never accept this baby or want my children around that situation at all!

I want to file for divorce but he said he won't sign anything!

He has only seen our children 1x since may and that was because I drove them states away to visit him and he ended up only seeing them 2x for 3 hours each and he spent the whole weekend that we were there at the beach with this other woman that he claimed was just an old friend but that obviously wasn't the whole truth as he did get her pregnant..... he wants me to stay married to him and accept the baby with this other woman and have our children around them.....

What can I do to get out of this marriage if he won't sign the papers and refuses to let me know where he is so he can be served? Can I ask for sole custody since he hasn't seen or helped with them in atleast 8 months?

The shitty thing is that in the state I live in since we are still legally married that his name will automatically be put on this baby that I'm carrying's birth certificate......

This was the last straw and I will never get over it!

He also hasn't helped with our kids at all financially either since the beginning of this year.....

I'm at the point where I don't even want to tell him when I have this baby or what the gender is or what I name him/her..... is that bad? He doesn't think this baby is his anyways and has been denying baby for months.....

What should I do???

I need to clarify.... when I say we're talk almost daily it is constantly fighting, and I have not talked about getting back together for months now.... and the reason we fight now is because he doesn't help with our kids or see them..... it definitely is harmful communication