Lymphoma? Cancerous blood cell tumors?
So, what makes you guess that?
Do you get nightly sweating?
Has eating become harder than it used to be?
Do you often suffer from fatigue?
(No, I don't have official medical training, but I do know a lot about all kinds of lethal diseases, being mortally afraid of getting infected with one myself. That includes cancers, despite that they're not infectious.)