He's with someone else already!!

I'm 7 weeks pregnant and 2 week ago my boyfriend walked out on me, said he didn't want the baby and when I told him I was keeping it, he very aggressively verbally abused me and my 4 year old son. So basically when we where together he had a court case against an ex gf because she smashed his car up, she's just done been 3 week ago with criminal damage and he got found not guilty of gbh on her friend. He's gave her my number this morning and she's told me they are back together, I am so emotional, I feel sick, exhausted, I just don't know what to do! I feel so alone. No one knows I'm pregnant and I just keep breaking down to my family and they don't know why 😢😢