Messed up my entire life

I got with my little sister when I was 16 and she was 15. We got secretive, she got pregnant and our parents got her an abortion. And then our parents kicked me out of the house and I was not allowed to see her for a few years. They took me in when I was 19 and I was overjoyed to see my my sister. But she had been treated by a therapist and did not want anything to do with me anymore. I was heartbroken. I fucked up my entire life because of a stupid mistake.