please help

i have beene diagnosed today with glandular fever as i was positive in a mono test and my blood cell count was abnormal. trouble is i have already had ebv before(tests done) about 7 yrs ago. since then i have been suffering with diagnosed M>E and fibromyalgia. i was starting to feel bit better even!...i thought you couldnt get glanduar fever twice??!! my dr is thinking of doing more blood tests as my sypmtoms are so unlike the symptoms of glandular fever i had last time, i have no sore throat at all! just loads glands coming up all over the place. im so tired and have beeing needing to wee alot. im worried that ill be set back to square 1 again ig this is glandular fever x2. or that i have something else another reason for the blood cell count to be abnormal despite the ebv maybe being reactivated. the hospital mentioned things like blood disorders and leukemia last week.