Thanks for your question.
Your EBV ( Epstein Barr virus) IgM is negative which signifies no active infection.
The positive IgG antibodies signify past infection & you developed immunity subsequesntly.
Your CRP level is high which indicates inflammation.
Because of your muscle pain, inflammatory myositis ( Polymyostis, inclusion myositis etc) should be ruled out.
Follow tests need to be done, CPK, Aldolase, ANA titer, Anti Jo1 Abs.
A muscle biopsy & a EMG/NCV study should also be performed to find out the muscle disease you may be having.
The treatment depends on right diagnosis.
Thanks for additional information.
Hashimoto's may cause elevated CRP.
But, given your predominant muscle symptoms, the tests I mentioned above should be done.