Scared, and pregnant

My period is a day late, and I just took a pregnancy test for the heck of it, thinking it would be negative, since I’m used to getting negatives. And well...

I can’t stop crying, and I’m so shaky. This is all I’ve ever wanted, and I’m so excited, but also very scared. My boyfriend and I were okay with the idea, but recently decided we wanted to wait. I’m almost 19, and he’s 23. He has no clue this is coming, and I’m not sure how to tell him. Prayers would be greatly appreciated.