My mood stopped cycling like that a few months after the med change. My brain was just readjusting. We realised this after when I leveled out again that it had been med related (although pdocs dont like to admit that )

My episodes before that and now are far from rapid cycling. I havent been hypomanic in ages and tend to just go into deep suicidal depression for a few months every so often.

But yeah, my pdocs told me that mood shifts within one day are extremely rare and those who experience them are usually more likely to have a personality disorder or ptsd.

But thats not the case in your case obviously cos your brain will be all kinds of confused right now and its to be expected.