anyone else have teen parents?

My parents were 15 & 16 when i was born, a year later my sister was born, and my mom had my half sister at 20. I have to say it wasnt easy. My paternal grandparents ended up raising me & my full sister (mom always had half sister) because my mom couldnt get her shit together.
My dad has always been there and is AMAZING. But my mom and i have had troubles over the years trying to build a relationship- which has become very good since having my son 4 years ago.
Just wondering other peoples experiences, i have few friends who have had teen parents.