Boyfriend still talks to his ex girlfriend and others

So I have been with my boyfriend for just under 2 years now, and i found out last week I am pregnant. I have questioned him a lot lately about him talking to other girls and especially with his ex girlfriend. She doesn't live in the same state but they talk constantly and she tells him she loves him and wants him to "rescue" her from her current situation. When I asked him to stop talking to her his reply is always the same " your insecure, and I'm not going to guarantee that"..He constantly calls me psycho and I need help because I don't like the situation. I still love him so much and i feel really lost

I've been in your situation - unfortunately if he doesn't respect your feelings *not insecurities when women tell your man they love him* he won't respect you. By telling you that you are psycho, he is playing the victim card. He is not a victim! It's tough that you are pregnant, but this soon into the relationship if he calls you names for expressing your feelings, normally it will not get better. I'm so sorry.