Angry parents

Hey ladies! So I'm 18 years old and I'm engaged and 13+5 weeks pregnant with a daughter. I'm living with my fiancé because my dad kicked me out, but I use my dads car on weekdays. My mom passed away in 2013. I told my dad I'm pregnant and he completely freaked out on me and said I'm doing nothing but taking advantage of him and disrespecting him all because I told my fiancé I'm pregnant before I told him. He's already said he doesn't want to be a part of my daughters life. My fiancé suggest we just cut him off completely and I save money to get a car and never talk to him again. But I just feel so bad doing that, I feel like I'm the only one trying to be nice and my dad is always mean to me. But yet at the same time I need to protect my daughter and myself and also my fiancé. So what do I do cut him off or keep trying?? Thanks for the advice!