Hey,
I'm 19 years old and 16 weeks pregnant. If you only told your 2 best friends one of them must have said something to someone, which doesn't make them a very good friend. I'd be careful who you confide your secrets in, especially at such a young age because you never know who you can trust. I've known about my pregnancy for a month and a half and hardly anyone knows, unless I've told them myself.
If you plan on keeping this baby, how are you going to go about school? You could maybe take a year off and then start grade 10 next year. I do highly recommend staying in school though even if you do have to take a couple years off. I just finished my second year of university and since I'm due in November I'm taking 2 semesters of and then returning in the fall of next year. School is definitely important for your future, and for that baby's future.
Don't worry about what other people think. Especially at your age, people will judge you because they don't know what it's like. Do NOT let them get to you because it will only make you look weak. Know that there's plenty of people that you can turn to for support.
I know telling your parents can be a scary thing, but you might be surprised by how they react. I was terrified to tell my parents and I was sure I knew how they'd react. To my surprise they were both excited from the minute I told them, shocked but excited. My entire family knows now (Grandparents, Aunts, Uncles, etc.) and everyone is excited for this baby. Though I do NOT have the support of my boyfriend (the baby's father), I have all the support I need from my family. You just need to be strong and tell them sooner instead of later. I chose to tell the parent that I felt most comfortable with first, so I told my mom. My mom then decided that it would be best if she told my dad, and it worked out really well. Maybe you and your mom could do the same thing? Just stay strong, I'm here if you ever need to talk.