Me and my father lived alone for years, we argued every day almost non-stop. This caused me a lot of stress, could this be the main reason for my a.L.L?

Not likely. Leukemia usually results from a genetic predisposition associated with environmental exposures. Stress should not be involved. Stress should, however, be minimized whenever possible, and you and your father should work with an adviser or clergy to resolve your issues. Stress itself is not good for either of you!