15 & Pregnant!

Hey. Im 15 about to be 16 in November and I just found out that I am 8 weeks pregnant. I told my boyfriend and he is excited and I told my mom and she was very angry. But now I just need to tell my dad. This is the problem with that. When my parents found out I was going out with him they told me I couldnt talk to him because he is 19. So I had to pretend like I was going to a friends house or to my sisters house and now im pregnant. I cant hide it for long and I dont know how to tell my dad. Any advice?