Hi , The mono spot test is not accurate. So you have to do the EBV test that has Early antigen, Nuclear antigen, and viral capsid antigen IgG and IgM.
Was your CMV test IGG and IGM, or just total? One will tell you if it was a past infection and the other if currently active. You didn’t specify.
EBV has the same tests. Then you’ll have a clear picture.
What we call “mono” is actually a set of symptoms caused by herpes family viruses like these, and others. Usually you get CMV as a child with minimal symptoms, and then EBV when older, which gives you “mono” which is possibly (according to what I’ve read) actually EBV deactivating CMV and causing the symptoms.
Either illness is more mild as a child, and has increasing complications with age if acquired later.
We are not doctors on these sites. But, I can give you some advice. Almost everyone has been exposed to CMV when they are a child as well as EBV. Usually this won't cause any symptoms when you are a adult because you already have antibodies to it. EBV, sometimes can reactivate like Herpes does. Then it can cause a variety of symptoms like fatigue and perhaps sore throat and/or other things. As for your sore throat and low grade fever. How high is your fever? If it is only 99 degrees, then it is usually not considered a fever because your body temperature goes up in the afternoon and evening and can vary. How long have you had the sore throat and are your lymph nodes swollen? You can have a test done for EBV to see if you have a current infection. But it is probably a virus that is more like adenovirus or some other virus. Do you have any white spots that look like pus in your throat? If your fever is high and you have pus in the throat or even without the pus but a fever of 101 F or higher and a sore throat you should see a doctor to see if you have Strep throat.