I just found my sister that i haven't seen since basically birth!

I am 20 years old and when I was 7 my parents died. I knew from an early age that I had a two half sisters and a half brother (same mother). The only sister that my grandmother(who raised me) talked about was named Jasmine. We always looked for her, we thought she was Amish. Well, I had baby cloths that were hers and pictures. We were in foster care together when we were like 2 and 3. She got adopted and I went home. ANY WAY, Just last year I believe, she wrote me a letter. It was addressed as Jasmine even though her name is Jana now. I couldn't believe it. I am writing this because a lot has changed in my life and I am a normal person with normal believes, sometimes i have a hard time with God and things like that but what I am trying to say is if you know how Mennonites believe then you will understand. is it normal for me to have some resentment that I can not be my full self and not feel bad around my sister. Many of the things I watch and do and all that they do not approve of. is it normal that I feel like I am going to hell because I do the things I do and I don't feel bad? I was raised like this, so for me this is normal. I don't understand how to feel, I love my sister but I wish she was like me so then I wouldn't feel bad. I won't try and change her. I love her the way she is and I don't judge her, but I feel like she judges me and every one that she lives with judges me for who I am what I wear and what I say because I am not Mennonite.