I am pregant!
Not much he can do about it. Based on your question you sound like you may not be "old enough" in soceity's eyes to be having a child, so Dad might be a little angry.
I was 17 when I found out I was pregnant. My mom thought I had gotten a speeding ticket. I told her it was a Positive Ticket! She was mad, but they soon get over it.
You have to tell him one way or another, I am surprised to you it go all the way to 14 weeks. I told my parents right away at 6 weeks.