Psycho-Stalker Ex

C
I have been off and on with my boyfriend for seven months. Monday we were off and I felt cool about everything.. Then I find out I'm pregnant Friday. We are both happy about it, however his ex girlfriend will not go away. She's been stalking me since I met him and it causes us to argue and fight. She has vandalized two of my vehicles, fought me in January, assaulted him many times, follows us out of town, etc. I have a no contact order on her, and she won't accept service to come to court to receive a permanent order. At this moment, I feel so lost, alone, upset, etc. What gives her the right to do whatever she wants to..to others?? I have three girls and I'm 4weeks pregnant with my 4th. I just feel like the stress is overwhelming!! It's to the point I don't even want to have my boyfriend around because of the drama with her. Any advice is greatly appreciated.