I am actually so relieved to read all of your comments. It validates my experience where no physicians have!
Covid positive August 2021 with 2 doses (pre booster time). Secondary bacterial pneumonia all treated at home. Have been connecting the dots ever since with a number of odd symptoms, one of which is internal vibrations. they began in December of 2021 and I experience them each and every day. Mine come only at night: buzzing in chest and down both arms. Not painful, not bothersome really but definitely not normal. They changed in character over time through the last year - early very coarse like holding a jack hammer, other times like a buzzing cell phone. The last several months quite mild but remain consistent and daily. I've made peace with this aspect and just go with the flow. MRI head and neck without explanation of symptoms. Neurologist just kind of shrugs. Hoping time will see them fade away. Thank you all for your input.