Advice needed

Christiii • Boy mom 💙💙🌈 06/2020, 08/2023💙

I really need help with something. So my ex boyfriend was the army and stuffers from PTSD and depression. We were together for a year and 5 months and have a baby boy on the way. Out of nowhere he started accusing me of cheating and any car he sees he says I know the person in the car and have followed a few cars to go confront them because he thinks “they are sleeping with me”. I moved back in with my mom to get away from it but I’m so worried his here by himself as his family are in Africa. My mom and I fear he’ll do something to him 😔. He also don’t believe our baby is his and has asked me for a DNA test, which is fine 🤷🏾‍♀️ But do ya know what I can do to help?