Ufff, there is so much to say here... I think there is no limit to how nuanced and complicated the subject of self-identity might be... its like trying to describe 'what is consciousness'. So I will leave you with just a few thoughts that arose as I was experiencing the journey through your words...

Perhaps you are not changing your identity, but rather learning to adapt to the ever-changing self. Embracing chaos, embracing change, let go of the labels and the "I'm this, or I'm that"... I am that which I stand for in this very moment. Yesterday I was very satisfied with myself in life, and today its an existential crisis - this IS who we are.

Identity is fluid like the preference of colors. When we're young we like bright simple colors, then we start to mimic others - take their colors. Then wishing to be different we start preferring sophisticated colors, rebellious colors, colors that make a statement, colors that are heavy. But at some point we might realize that ALL colors have a place on this canvas when applied in harmony with others... there is no one identity or "I'm am" that defines you, but a symphony of adjectives that ocellate back and forth.

On a personal note, I have been in conflict with members of my family, because if their inability to separate their identity from national identity. This is the worse one in my book - when one's identity is defined by the borders of their country, or by history they weren't a part of..

Identity should be a canvas that you are always free to paint over it.

PS, though I am skeptical of astrology, metaphysics and all that 'stuff'... I've always enjoyed your writing on a spiritual level (if that makes sense). We all yearn for this would to be more than it is, and we want our identities to reflect that... and I feel that this is the underlying spirit of this post, especially the pre-last paragraph.