I have many of these symptoms and have had much neurological testing, all showing nothing abnormal. Some of the medication’s I have been taking in the past and one that I am still taking maybe contributing to these muscles twitches but over the last nine months they went from Slight to constant to occasional. I am in a support group for benzodiazepine users who have been prescribed them for many years and muscle twitching is extremely common in that group. My doctor also took me off Lyrica because he said the symptoms worse. I understand the terror of thinking you have something really wrong with you because I spent a good part of the spring summer and early fall crying and thinking I was dying. I don’t know if you take any medication’s, but there are support groups for people who have these odd symptoms, and are taking benzos in particular, but also other psychoactive drugs. I had some of these symptoms often on for many years, so I don’t believe it has anything to do with Covid or the Covid vaccine as some people in this group have mentioned.