Why is my baby father being such a jerk to me?

im 15 weks pragnant and he told me to get lost in my 11th week and he change his phone number on me and he told me if i need him or anything to call his dad like im going to call his dad then i asked him for 400 hundred dollars bec he was going to give it to me when we were still together but he told me he has to see if the baby lives to b born befour he gives me anymoney and i miss him i keep trying to get him to go back out with me though email but he just tell me i need help to get it im scared that he will git my baby after he or she is born what do i do do u think i should give him time and write him and see if he want me back or should i just give up please dont tell me to give up bec i dont want to i still love him will i get past this or should i keep trying to get him to go back out with me he might already have a gf dont know he tell me to get help he think im bipolar and i dont think i am i think i just have anger problems but i dont know where to find a group