What if you don't feel like you'r the same person when you'r committing a sin?

What if you feel like your not the person you are when you commit a sin meaning if I committing a sin I don't feel like it's me doing it but then after I realized it is me. I don't understand why it's like that because I never in my senses when I am committing a sin and I regret it right after and hate myself. But I always felt that its not me that is doing it, like I always feel like someone is controlling me and I cant stop them. After I always feel guilty for not stopping myself from committing a sin?