Thanks for sharing. Your family will know best if your irritability is episodic. And your therapist might know if such episodic irritability could be mania.

To me your story reads like you have trouble handling feelings of guilt. Stripping off the shirt might still be a reasonable reaction, but in your room you probably felt guilty for taking it and moreover throwing it in your sister's face. Then your guilt turned into anger, first at yourself, afterwards at whomever else.

I would suggest you try to notice when you feel guilty about something, and then tell yourself to accept yourself despite the mistake you made. Also, and that's something I learned from own mistakes, however bad a situation is or however angry others already are, one can always still make it worse. Or, conversely, no matter how bad the situation, one can always make it better by behaving and reacting reasonably.