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Hello and thank you for your question.
As you have history of anxiety the symptoms you are experiencing is more likely due to anxiety that is manifesting in physical symptoms.
Especially when all the test were ruled out these symptoms you are experiencing is due to anxiety and would get worse if your anxiety is not treated.
You need to see a neurologist or a psychiatrist who can prescribe you medication like xanax to relieve your anxiety.
Yoga and meditation can also help to ease the symptoms.
Please get back to me if you have any further questions. Thank you.