Need help!!!

Ha
So anyone who is following me knows that last week my boyfriend and father of my daughter ran off the "LA" with another girl (was really Vegas come to find out). Anyway. I sent her a message on Facebook, under a different account and name telling her to back off. I wasn't extremely rude or anything. Just told her to get lost. She then wrote me a huge message saying all kinds of horrible things, so I exchanged some not so friendly words to her. She said that she is filing a restraining order against me, when I've done nothing wrong but tell her to leave me alone and my family.  I did call her quite a few names, like everyone I could think of. But I don't think that is probable cause for a restraining order??? Then she also said then she notified the police and they are sending a warrant for my arrest for trespassing!? I went to her house, sat in my car down the street for about 30 minutes or so. And worked up the courage to knock on the door. No one answered so I got back in the car and went home. Is that trespassing? To knock on a door????
Any help or advice is appreciated, I'm trying to take him to court for child support and full custody. Need to know if this will affect me at all...