I should have not been born?

my father has always been a very controlling man, for the past 3 years i was working for him for nothing and was abused every day because of his own financial mess, i was to gutless to leave, i fell pregnant and when i was 7 months pregnant he yet again had another outburst in front of my 2 sons and threw a fan which nearly hit me, I had had enough and argued back and despite his blackmail and threats did not go back. it has been 9 months since all this has happened and he is still trying to cause trouble for me. he is telling people i know that i stole 100 thousand dollars from him( big lie) telling people im living with my ex while claiming a sole parent pension and ringing social security and saying this, (dont live with him but he does visit his kids), the thing is i know the truth but no one else does and Im scared of loosing my children or going to jail over these false allegations, and to top it off its my so called father doing this, i cant even talk to my mother with out him threatening her, she rings me and tells me how he says he wishes my kids and i were dead, i feel so alone and scared and this pig will win. wat type of father is this