Pregnant and getting a divorce

So my husband and I have been together for 14 years and married for 4 years. The day I told him I was pregnant he told me he was engaged to someone else. He doesn’t really help me with our 5 year old daughter or this baby. But nevertheless I found out I’m having another girl. My daughter and I are so excited about this. She really wants a little sister and I’m so happy that she’ll have one. I want to keep a positive, safe, loving environment for me and my girls.