Is it normal when i look in the mirror i dont see myself? (metaphorically)

When I look in the mirror it's like I'm looking at someone else, and not me.

When I imagine myself doing something, I don't imagine the person in the mirror.

In fact, when I make facial expressions it kinda surprises me to see it in the mirror.

I think perhaps I feel like my appearance does not match my personality, or maybe I just haven't been exposed to the mirror enough lately.

Is it normal to not recognize yourself in the mirror?
More importantly, what should I do?