I developed internal vibrations when I was on abx for Lyme. They occurred mostly in my left knee, sometimes my left ankle or both....and occasionally in my right flank.
They improved with treatment but I'll still get an occasional quick "buzz" in my left knee as part of a herx on my current protocol.
Since you are taking meds that address both Bartonella and Babesia, I'm inclined to think that the symptom would be exacerbated as part of herxing.
Increasing detox and sustaining that level can only help. Perhaps you might incorporate some new methods based upon the suggestions listed in this site:
www.tiredoflyme.com/detox-methods.htmlAnd, if you're inclined to take any herbs, Buhner recommends several different ones that help with neuro issues:
Kudzu
Stephania
Lion's Mane
Chinese Skullcap
Hope you feel better soon!