My son who is 7 has had an enlarged lymph node in neck since last December. Hasn't gotten bigger but hasn't went away, dr did blood test which came back today to say he has a low white blood cell count. He seems fine in himself, usual amount of energy, a bit dark under eyes. He has been referred for further tests and I'm terrified it's something serious, dr Google said leukaemia and now I'm a mess. Anyone else had a low white cell count and its been nothing to worry about?