Ex 1: wanting to change appearance way too often VS ex. 2: wanting to look a static way, but this way is not that you see in the mirror (you may think "Why do I look like this? I'm supposed to look like that!").

Not to mix the two feelings. I wrote them in the same post to avoid spam and to understand if they can coexist in some cases.

Can anyone help me on giving these experiences a name? 

NB: It's not asking for a diagnosis. I am mentally ill myself and I would never trust something from the Internet alone. It's because of a character. I thought of DID or some kind of dissociation disorder, but as I don't experience these things I cannot know how the dynamics are and what feelings are involved.