Boyfriend threatening to take baby

I'm 30 weeks pregnant and I dont know what to do. Ever since I have been pregnant my boyfriend and I fight like cats and dogs. We pretty much cant go a day with out fighting. I dont know if its hormones or what. He told me the other day that if I dont give the baby his last name he won't sign the birth certificate. Then on the other hand, he told me that as soon as I have the baby he will take her and I'll never get to see her. Can he take my baby? I really think that we would be better off not together.

He doesnt help me with anything, like paying any of the bills, buying any of the food, or cleaning the house. He also tells me that I am lazy all the time. He doesnt give me any money to help with rent or anything. He pretty much lives here for free. It's not like he doesnt have a job either, he has money but he gets paid on Friday and by Saturday he has no money. What he spends it on is beyond me.

He throws fits like the other week he threw a bowling ball across the room because we were fighting. He purposely starts fights with me just to get me upset. I know its not good for the baby so anytime he does it I just go to my parents house. Then he tells me I rely on my parents too much.

He also tells me that I should be lucky he stayed around and didnt leave every time I ask him to help me pay a bill. I dont think its fair that ever since i found out that i am pregnant I either save every penny for the baby or am paying it out on bills and rent and he spends all his money on his truck or computer or whatever else it is that he buys.

He is stressing me out so bad that I think it is putting me into depression because all I do is cry lately. I know its not good for the baby. When I am upset about something he tells me that i'm always mad anymore and that i just need to stop acting like a baby. I just want my baby to have a happy life and a happy family and i dont think it is ever going to happen.

I also think that he is either being real mean to my dog or is actually hitting the dog. My dog wont even walk into the same room as he is in. I dont know what to do! If he is being mean to my dog what is he going to do to my baby when she wont stop crying.

I know I will make a good mommy and I have no doubt that I can take care of my child 100%. I just dont know what to do with him. I'm so worried that some day he will take my baby!

Am I so wrong that I am so frustrated with him living with me for free?
Can he take my baby?
Am I wrong to think that I should not have told him that i was pregnant and just left him without knowing?