What do my symptoms indicate? --I am 18 years old. I am frequently tired (though admittedly do not go to bed very early), I've had a couple of viruses over the past two months: the first causing headaches and sinus pain, and the second, tonsillitis-like symptoms that went away after about a week. Today my right arm has been aching a lot for no apparent reason, and for the past month or so, I've been spitting blood when I brush my teeth! I am quite concerned after googling my symptoms and leukaemia coming up in the search results!