baby daddy help

i broke up with my baby daddy well over a month ago. I've been trying to keep it civil and we were friends and then out of the blue he started trying to force me to give my baby up for adoption and saying things like ill be a horrible mother etc. i told him to stop talking to me and he wont stop blowing up my phone. when we were together he was very emotionally abusive and manipulative and he even admited to it, so with hows hes been acting i strongly dont want him in my life or the babys. ive been thinking hard about it for a bit now and please just see from my side of things. every time i get a text from him i get scared. tonight he texted me trying to get me to sign my parental rights over to him, and how he will bring it to court and have social services involved and how i apparently wont pass anything. my only saving grace at the moment is that im still pregnant and that he doesnt have any rights. i just dont know what to do, or how to deal with it. i cant lose my baby, especially to him. hes into drugs and drinks a lot too, i dont want my baby to be raised in that kind of life style.