Hello, Welcome to Just Answer and thanks for your question. Can you explain what you mean by constant internal shaking? What medications do you take on a regular basis, including supplements? Have you ever received a diagnosis for this shaking? What other symptoms do you have with it?
There are lots of different reasons for tremors of various types. However, they all have to be evaluated by a physician in person. Test results from the past really are of no use to diagnose your current condition. You need the full testing again. Referral to a neurologist may be necessary depending on what the examination and tests show. Along with neurological problems like Parkinson's and MS, there are things like anxiety that can cause tremors. There are probably at least a 100 things that could cause the problem, but seeing your physician is the first step.
I think you should discuss this with a psychiatrist (i.e. a medical doctor). Anxiety is still right at the top of the list of disorders that can cause tremors that aren't action tremors. Parkinson's in later stages causes visible tremors, but early on it may not be visible. I've had patients who also discounted this as a diagnosis for tremors - until they were put on anxiolytic medication and the tremors stopped.
It isn't possible to diagnose anything online. As I told you, I have had several patients with your symptoms that have been diagnosed with anxiety (kicking and screaming all the way that it couldn't possibly be) and improved 100% on medication for it.
A positive ANA is non-specific for any particular illness. It is used along with other things to rule out autoimmune disorders. However, autoimmune disorders don't produce tremors. EBV will always be positive if anyone has ever had mononucleosis so that isn't a useful tool for diagnosis either. Interleukin 8 only means that there is some inflammation somewhere in the body. This can come from anything from a sunburn to psoriasis.
I will opt out since I really don't have any more time to carry on this debate. Perhaps another expert will want to address your puzzle. You will be notified by email if someone else replies.