Is it normal i always shift "personalities"?

Shift being similar to the keyboard shift but instead having multiple modes that change in a matter of months.

Experiencing it be like that you at some day wake up and everything seems different. You feel like you missed something. There's something you lost. You can't remember a few days but you don't know until you face the facts for example when people are talking of certain events that took place during said days but when they ask you all you can say is that you don't remember.

You choose different clothing, wondering where all your stuff went as the wear in your wardrobe isn't yours though it reminds you of someone that you've forgotten.

People tell you that you've changed but you don't listen to them until they proof it. You're suspicious of them, thinking they might have always watched you for some strange reason that you don't know.

You want to hide from them but they always find a way to hack your daily life, alter it's elements to their liking. Then you just wake up again, knowing nothing but that you miss some information. All progress lost.