Please correct me if I'm using the terminology incorrectly!

I recently acknowledged I have two "personalities" -- a flirtatious, overconfident (destructive) personality &amp; an ashamed, easily-irritated (also destructive) personality. I feel great while I'm confident and flaunting what the universe gave me, but afterwards, I feel horrible. I feel ashamed for being flirty, I feel ashamed for wanting to feel superior, and I feel overall like a fuck-up. And I need CONSTANT attention//validation whereas when I'm the other "personality", I do not need it. At all. 

I am not articulating this as well as I'd hoped I would, but I am hoping someone understands what I'm trying to say. To me, it feels like on certain days I'm a completely different person -- interacting well with literally everyone, turning on the charm, and rocking it. But the other days, well, I regret it. I regret everything. And yet I still toss the "personalities" (?) back and forth. Like I have no control. 

Does anyone have any advice or similar experiences? Is this "splitting"?