Advice for a Newbie? Please?

Tiffany
So today I SHOULD be on my 3 day of my period. So out of worry I took a pregnancy test and it has come back positive. Ran to the ER because I wanted to make sure I was for the fact of me being on some medication. They told me what to stop taking and that I am pregnant because of how accurate the tests are. I just took my 2nd test at home to make sure it's positive. I am happy but I'm like not excited about it like it hasn't hit me. The one thing I do know I'm scared of the most is my father because he's all I have left. My mother disowned me and I'm scared my dad will too. Do you guys have any advice on how to tell my dad? Because I just thought of putting my positive pregnancy tests in a box with a onesie that says "Worlds greatest grandpa" on it or something. Please help. Very scared.