Son compartido

I removed my account from my sister phone after I thought I wanted to have full control my account. When I deleted it my sister's account on a website also lost connection. I found out my sister has been using my account for like half a year. I was terrified, she was using my account to use and posted very embarrassing things and judged people. I was mad and started screaming at her, this happens really often, I had anger issues. I stormed up stairs. I know I'm kinda an a$$hole for screaming but