Philippa, nicely stated. Body atoms are constantly responding to vibrations, rotations, magnetic fields, electric fields, photons, charge, discharge, and et cetera. Much to fast to be felt in any way, or course, except harmonies created for body and soul.
For your consideration ...... use of magnets is briefly presented at web site noted below. I wasn't aware of the vibrations going in circles like you do - just side to side vibrations. I still feel them, but not from side to side now, just a general very fast internal vibration, especially when I wear magnets, and also when I meditate. http://magneticosleep.com/about-magnetism/the-bi-polar-theory/
