16 & Pregnant

I'm not looking for people to judge me, I just need advice right now. Trust me, I've beaten myself up enough. I'm 16 years old and had ovarian cancer 2 years ago which resulted in getting one of my ovaries taken out. The doctors always told me it would be extremely extremely difficult for me to ever concieve. I'm sexually active but even though the doctors told me this, I still used contraceptions. I'm not on birth control but my boyfriend did use a condom every single time and on top of that, pulled out almost every single time. The day I was supposed to get my period came and went so 5 days later I tested and sure enough I'm pregnant. I haven't told anyone yet because I don't know how to. I am extremely saddened because I'm a NHS member, captain of the girls soccer team, and my boyfriend is also a NHS member and captain of the football team. And now I'm going to be bringing a baby into the world. My boyfriend always told me he never wanted any children. I don't think he'd leave me but I have a fear of raising this baby on my own. I have a fear my parents will hate me. So many fears and whys and what ifs. I'm not a stupid girl and know that if it comes down to it I CAN raise a baby on my own. I need some encouraging words because honestly I feel so alone and it is a terrible terrible feeling. How do I tell my boyfriend? My parents? My grandma? I'm lost. I'm really sorry for the rant guys.