I was in your situation when I was pregnant with my son. My parents are divorced and I became pregnant while living with my dad. He told me he couldn't support me anymore being pregnant...a person who helped create me...he even told me he wasn't paying for my health insurance anymore once I turned 18. He told me I couldn't possibly be a good mother to my baby but he was cutting me off? Who was the bad parent? So, I went to live with my mom. My son turned 10 months a couple days ago and the best part about this situation was my dad's side of the family watching me as a mom. They apologized for everything they did to me. They tell me that I have the happiest baby they have ever seen...maybe because I love my son and care for him and put his needs over mine. My dads side did not go to my baby shower. It's hard looking at my son and knowing that my dad's side looked down on me and him but I shrug it off and know that whatever my son does when he gets older, I will love him through it and not kick him out of my home. I keep in touch with my dad's side of the family but know who my real family is...the people who stuck by me through my hard times.
Good luck with everything, it's hard to tell you to forget about your dad and his family because they ARE family but once you have your precious baby, they'll come around. As for me and how I handled it, I forgave them but I will never forget it. All I know is I am the mother now, I can make my own decisions in my life and for my son. Even though my dad is my dad, I don't need him as much as I used to. Never forget who was there for you in the begining, be around positive people who love you, you can't get away from the hurt your dad and his family put you through but you can put it in the back of your mind. Your a mommy now, you need to be thinking about your future and you baby's. Good luck.