Am I really "mentally unstable"...Seriously...?

I am 8 weeks pregnant and it has been a long journey with the babys father. We are not together and we are havin a tough time communicating. I recently found out that he has been talking behind my back and "tolerating" me so that I can be quiet and not remind me that he has a responsibility. I found this out through breaking into his emails and overtaking his myspace account. His myspace account now depicts a "sperm donor". His Mother had the audacity to call me mentally unstable an she is worried about her granchild because of my mental health. I am not crazy, just frustrated. He is not stepping up to the plate and refuses to speak with me. So I took it upon myself to send him a wakeup call. I refuse to give him back his email pwords. He cant break into them because I changed all his information. I am sick and tired of this game. I thought it would make me feel better but I still feel like crap. HIs Mom says Im punishing her by threatening he cant see his kid. I am drained!!!!