Getting pregnant as a teen on purpose?

Im a Senior in Highschool, I have 17 years Old, my Boyfriend is 18 We've had babyfever for a long time now and we cant wait any longer. He really wants a child, and although i wanted to wait at first, i cant wait any longer. I have a steady job and so does he. The only problem would be my parents. should i talk to them first..? or tell them Once im pregnant? Please no hate, this is just a thought.