A childhood belief about i'm different

My mother constantly told me I wasn't her child. She said there was a mix-up in the hospital and I had been switched with someone else. Many of my aunts and uncles called me a changeling because I was so different from my brothers, so it was easy to believe I didn't belong. I spent many nights wishing my real parents would find me and take me home even though I knew it was impossible. You see, the reason I was switched was because they didn't want a baby like me and they stole the "real" Theresa and my mom was stuck with me. And I knew it was true, my mom told me about it.