14&Pregnant!

This is going to be long, and I'm really nervous so please just bare with me and give me the best advice as you can. don't judge me because people tend to do that here. 
okay, so I'm a freshman in High School, im 14 and I have a boyfriend we are 1 year apart. We are sexually active, we've used condoms and sometimes we didn't I don't really remember and I'm too stressed to really think about it right now. I left my house and was secretly staying with him, his mom was cool with it she didn't mind but my mom flipped and kicked me out so in order to keep me with my family I moved in with my dad. he knew how I feel about my boyfriend so he put me in the school that he was in and my dad lives by my boyfriend so it was all fine. I didn't know I was pregnant at first but I knew something was different about my body. I was a cheerleader, really
fit and active but soon my body felt like it was shutting down on me. I could run as much, jump, or flip and started having weird pains in my stomach and all I wanted to do was eat and craved foods. so I quit the team. 4 months later...which was last week (this sounds crazy but I swear I was and still am 109 pounds not visibly pregnant) I was laying down with my boyfriend and I layed my phone on my stomach and my stomach jumped and my phone fell off as if it was kicked. my boyfriend didn't see so I put it back and it did it again. so, I was like omg I think I'm pregnant. don't judge. I saw that it said something about fluttering and its your body changing to adjust to being pregnant, so I thought I was maybe 3 weeks or something. i haven't told my parents because I'm so scared I don't know what to do. so i told his mom to take me to an abortion clinic. she took me and him and it all seemed fine. they checked me out I told them what happened so she put the jelly stuff on my belly to see the baby. then looked back at me and said no, you can't do this here I have to send you to a different doctor. I asked why and she told me I am 6 months pregnant and handed me an ultrasound picture. I'm still in shock. how could I be 6 months pregnant? I don't know how to tell my parents. His mom was totally happy and jumping for joy, he was happy too he cried as I cried but I don't know what to do. it's a real baby. I'm so scared. 
Update: I told my dad, he was upset but he supports me. he gave the choice of abortion, but I told him how far along I am and the process would be a surgical abortion where the take them limbs apart from the baby or something like that and I don't think I'm interested in that happening. my entire family supports me, so I feel better about this situation. thank you all for the advice. I'll keep you updated on my next step.