Why do I fear my parents and what they will think?

So for months me and my bf have been *Talking* about getting pregnant, like really in depth.

But whenever I sit and think about what I would tell my parents, I get shit scared.

I know that at 16, it's not really a great idea to sacrifice a "future" to have a baby, but in my mind, my future won't look right unless I have a wee baby.

When I think of my future, I see me, my hubby, and between 1-3 kiddies. I see a very comfortable home, with a decent income. Yes I suppose education is important but you can survive without a degree.

So why is it that I'm so sure about having kids young ( maybe not this year but I would have a baby younger than 19/20) but the thought of having to make my parents understand what I want, makes me uneasy and super super stressed?

Ps! , my parents have always wanted the best for me- but by that they mean what THEY think is best for me. They're quite stubborn at times; like a lot.