The McDonald Criteria is what a diagnosis of MS is based on, with clear MRIs you do not meet the criteria for MS. Your Drs. have included many tests which have all come back normal. For this reason your Drs. cannot find a cause for your symptoms including MS.

Symptoms are subjective (things you experience/feel) and your Drs. have not been able to find objective (positive testing pointing your Ds. in a certain direction) evidence for the subjective symptoms.

Do you deal with anxiety? Anxiety can cause body wide physical symptoms and can cause symptoms similar to MS.

MS symptoms are not positional.