Is this a disease, what should I do 😑?

Most of the time I feel as if several people are talking among themselves in my brain. I know what they said. As if there was another person inside of me. One side of me is antisocial, while the other side is social. I'm very emotional, but the other side of me has nothing to do with it. It's like that person is an adult. Tired of forgetting almost everything. People tell me I do things I didn't do. What's wrong with me, what should I do?
Is this a disease, what should I do 😑?
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