Am I wrong for being so upset?

Am I wrong for being so upset that my Sperm donor has already opened a case for child support and the baby isn’t even here yet?! Upset doesn’t even describe what I feel. I’m fucking pissed... he’s just doing this to get under my skin. He has made my life hell these past 8 1/2 months, he has said he didn’t Want to be a part of his life. That he was going to abandon him and leave the state to get away from me -.-. That he has never loved him and will never love him the way he loves his “daughter” even though that little girl is not his biologically and he hasn’t been in her life for the past year and half. So am I wrong for being so pissed that he couldn’t even wait until I had my son in peace not even give me time to heal after my son? I just want to break his neck: