Oh, this absolutely happens to me. It happened especially for the first few years (about 3) of therapy. Sometimes I would feel so "not myself" that there would be another me, or a part of me, and that part was like another person, even with a different name and different interests. Sometimes I'd take on the interest of that "other me" (for example, roller skating) and make it my own.
It's dissociation, a reaction to anxiety. Dissociation is our mind's way of protecting us. But it can feel very odd and even unsettling.
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