Glandular Fever (Mono)?

My daughter's blood test came back showing that she has had Glandular Fever...
However, she has a headache constantly every day, pain near her ears, stomach pains and fatigue... is this all caused by Glandular Fever? Does that mean she has it now, not in her past.
The doctor said the blood test can only tell that she has it in her system but can't tell him when she got it?
Doctor said she needs not to miss more school but she is just too unwell to go??

I read a few of your questions and I just have a few suggestions.
Did you know there are headache speacialists. From what I heard from one of my friends is that they are very good. That might be an option if your insurance covers it.

Maybe you already know this but there is a syndrome type thing after mono, it hangs on and makes the person very tired with several other symptoms. Did she just recently have mono? If she had it as a young child, you might not have noticed because it just looks like a cold. An older child will seem to have strep throat. Actually, strep throat and mono sometimes come together and all that's treated is the strep.

Do you ever take her temp? I would check it every day for a week just to see if anything is going on there.

If she has the mono syndrome, if might takes months for her symptoms to go away completely. Maybe you could home school her if she really can't get back to school yet.