I too am female, 57, vegetarian and vaccinated but my vibrations started long before Covid. Mine happen all night but I am only aware of them when waking. My wife tells me about them when it gets bad. I have sleep apnea but use a cpap. I take an ssri for depression. I also have auto immune disorders causing full body inflammation. Also, have cervical bulging discs and had lumbar discectomy 18 years ago. I am going to look into the pinched nerve theory as my neck is causing me more pain and migraines. My doctor told me the tremors were nothing to worry about but something must be causing them. They are not unpleasant but it is distressing.