I’ve had several similar episodes, diagnosed as Benign Paroxysmal Positional Vertigo (BPPV). Believe it or not, knowing which way things are spinning is useful information. BPPV is usually caused by a calcium crystal breaking off inside the semicircular canals inside your ears, and getting stuck in the dead-end of one of the semicircular canals. When it presses on the nerves which sense direction, it sends confusing signals to your brain, which makes you feel vertigo. (Brain feels one thing, eyes see something incompatible). We all have 3 semicircular canals inside each ear, and by knowing which direction things are spinning, you may be able to tell which semicircular canal has a calcium crystal stuck in it. There are Physical Therapy exercises which you can do (or have done to you) to help dislodge the crystal and stop the vertigo. Hope that is helpful!