Update: I'm 16 and pregnant and I don't know how to tell my dad.

I ended up telling my dad this morning at breakfast. He was definitely upset, but he wasn't mad at me. He didn't know that my ex hit me at all or that he had pressured me into sex and I think that made him more sad than anything. We talked a lot and cried together and he agreed that I should keep the baby. We made an OB appointment for Wednesday to see how far along I am and make sure the baby's healthy, which I'm very scared for, but my dad will be there and hopefully that'll make things a little better. I know I'm really lucky in the sense that my dad has a well paying enough job to support me and this baby and that he's willing to. I also had a male best friend that my ex made me stop talking to and our friendship ended but I called him this afternoon and we talked for a long time about everything and he was really supportive. I think he's going to come over tomorrow too. Talking to both him and my dad really helped and I truly do think things are going to be OK. I love my baby already and so does my dad. Thank you to everyone who left supportive comments.