Yes, you can be diagnosed with ALL followed by AML. ALL is the cancer of lymphocytes whereas AML is the cancer of the myelocytes. It can be diagnosed together (Biphenotypic leukemia) or separately.
Weakness
Fatigue
Feeling full when you didn't eat
Constant vomiting
Recurring headaches
constant bleeding in strange places/not cuts
hair falling out
These are just some of the symptoms....