Sad that everything is worse now

So I have 5 kids. Not all are from my marriage. Weve been together for 5years. Recently have had issues and it isn't better. We separated and worked out or tried to. I had this app to avoid fertile week and he was linked. It seemed all he wanted to do was have sex that week as I he wanted me to be pregnant. I even said what if something happened. He said he couldn't be mad because clearly it was his choice to do so. Now I am. Sadly. Things are worse. I don't know what to do. I'm terrified. I think things happen for a reason and I have no idea what it is. I want to run away.