Husband had an Affair

When I was 8 months pregnant with our second child my husband had an affair and she got pregnant the two kids are 11 months apart. They names the baby after him as well. After about 3 years of back and forth something changed in him and he begged for me to come back I eventually did and we were working on our marriage to gain trust again. He then wanted to have another baby and was talking and asking all the time I on the other hand was not so sure it would be a good idea. However, after much consideration I stopped taking birth control and was pregnant within two months, I had a ball of emotions run through me and did not think it would happen so fast. It took me sometime to feel the excitement that he was feeling from the first day I had told him. Fast forward, I am now six months pregnant and I found stuff in his phone that definitely should never be in a married mans phone. I confronted him, and he confessed to having feelings for her (the girl he had a baby with) it's been a little over a week since I found this out and he says he's had feelings for her for a few weeks. Let's also keep in mind they were going through a bad custody battle as well for the child, and then now this bomb has been dropped on me. He wanted me to keep it private until he knew what those feelings were and we discussed what we were going to do. My anger got the best of me and I wound up calling his mom about everything on speaker to let her hear him say it and we'll that didn't go over too well with her and he was really mad at me for calling her. As of now I don't have plans to leave just yet, it's all still a shock, and I don't want many people knowing just yet. I feel like such a fool. I'm praying that my two children and my unborn will get through all of this. Positive thoughts for us!