Hi.. Leukemia and anaemia can only be diagnosed on investigations alone.. As the symptoms of these conditions may also be seen in plenty of other conditions.. These condition can also include psychogenic causes.. So do not think too much and do not fall prey to the words in the net.. The best way to know if you have the conditions that you presume to be having is by getting the investigations done.. What test have to be done can only be suggested by a doctor.. So see a doctor or you can discuss these with the doctors online...