Hi and welcome,
It's highly unlikely to be related to a neurological condition like MS, and at a guess it's more likely to be related to the active Epstein Barr virus, otherwise known as mono that showed up in your blood tests.
"Interpretation of EBV Antibody Tests
EBV antibody tests are not usually needed to diagnose infectious mononucleosis. However, specific antibody tests may be needed to identify the cause of illness in people who do not have a typical case of infectious mononucleosis or have other illnesses that can be caused by EBV infection. Symptoms of infectious mononucleosis generally resolve within 4 weeks. If a person is ill for more than 6 months and does not have a laboratory-confirmed diagnosis of EBV infection, other causes of chronic illness or chronic fatigue syndrome should be considered.
The interpretation of EBV antibody tests requires familiarity with these tests and access to the patient’s clinical information.
Interpretation of EBV antibody tests and diagnosis of EBV infection is summarized as follows:
http://go.microsoft.com/fwlink/?LinkId=30857&clcid=0x409
Susceptibility to infection
People are considered susceptible to EBV infection if they do not have antibodies to the VCA.
Primary (new or recent) infection
People are considered to have a primary EBV infection if they have anti-VCA IgM but do not have antibody to EBNA. Other results that strongly suggest a primary infection are a high or rising level of anti-VCA IgG and no antibody to EBNA after at least 4 weeks of illness. Resolution of the illness may occur before the diagnostic antibody levels appear. In rare cases, people with active EBV infections may not have detectable EBV-specific antibodies.
Past infection
The presence of antibodies to both VCA and EBNA suggests past infection (from several months to years earlier). Since over 90% of adults have been infected with EBV, most adults will show antibodies to EBV from infection years earlier. High or elevated antibody levels may be present for years and are not diagnostic of recent infection."
https://www.cdc.gov/epstein-barr/laboratory-testing.html
Keep in mind that the majority of MS symptoms are also associated with many other medical conditions but in MS the symptoms are from the damage caused by brain and or spinal cord lesions, and because of the way MS lesion damage basically works, 'all over' is one of the red flags pointing away from neurological conditions like MS..
Hope that helps.........JJ