17 and Pregnant

Just found out that I am pregnant a few days ago. I am a jr. in high school, i cant tell my parents, they will kill me. I am currently with my boyfriend ( father of the baby) and he is being very supportive but he has his whole life ahead of him. I dont want him involved because he has so much planned for himself. I plan on keeping the baby because i am against abortion and i can never give my baby away. I am so scared and dont know what to do. This wasnt planned, we were on contraceptives but something went wrong. I have my first appointment this saturday. Any advice will be great and thank you.