My boyfriend is over the moon with the BFP!

But I don't know how i feel about it, I'm really scared about the whole thing and I think I'm far too young, infact I know I'm too young at only 17 I don't know how to tell my mum or how to deal with it and it's really freaking me out now but I would never see myself get an abortion I couldn't get rid of my own flesh and blood it's cruel, that's just my opinion but can anyone offer me some advice ?