Restraining order?? please help?? 20 y/o girl not sure what to do....?

ok so my now ex-boyfriend( we were together for 6 years) & i got into it 2 days ago. i broke up with him cuz he was startin to act like a fool & it looked like it was gonna get violent. well i broke up with him & he punched me twice in the shoulder while i was holding our daughter. finally my stepdad came & made him leave. today i tokk him his clothes & he went ballistic & was screamin so i left. while i was driving away he hit my car twice. he hit one of the windows. & had it broken it would have shattered gl all over our daughter. he has been callin & wanting to argue over the phone. i am worried he is gonna come over & try to take our daughter, i know she is his too & he has rights to her but they way he is acting i dont feel comfortable with her being around him while he is this angry. my mom told me she thinks i should get a restraining order against him. i dont know what to do.. can somebody please give me some advice??? or opinion??? please???