How to tell my dad I'm pregnant??

I'm only 19 years old and I'm extremely nervous to tell my dad. My mom already knows, she accidentally found out when she over heard me talking about it with my boyfriend and now I have to tell my dad. I'm an only child and I'm his little girl and I'm young so I know he will be so hurt and disappointed. I just don't know how to break it to him in the easiest way. My mom is rushing me to do it cause she feels bad keeping a huge secret from her husband and I live with my parents still so I can't keep hiding it. Do I just come out and say it?? Please help 😞